Oswaldo Luiz Alves

• Professor
• Professor (Full) at State University of Campinas (UNICAMP)

Palaemon pandalirformis (shrimp) is a species widely distributed in the Brazilian coastal region and with an important economic role. In addition, this organism is considered an indicator of environmental pollution in estuaries; however, its physiological responses to toxic environmental pollutants, including pesticides and nanomaterials, are not w...

Two-dimensional (2D) materials have emerged as an important class of nanomaterials for technological innovation due to their remarkable physicochemical properties, including sheet-like morphology and minimal thickness, high surface area, tuneable chemical composition, and surface functionalization. These materials are being proposed for new applica...

The acrylic resin used for the prosthesis base accumulates biofilm, causing diseases such as stomatitis. The addition of some nanoparticles promotes antimicrobial action. This study incorporated the nanostructured silver vanadate decorated with silver nanoparticles (AgVO3) to the acrylic resin by two methods and evaluated the cytotoxicity for human...

This study aimed to evaluate two methods of the incorporation of nanostructured silver vanadate decorated with silver nanoparticles (AgVO3) into acrylic resin and characterize the profile of early and late microbial communities in class and family taxonomic level by pyrosequencing. The specimens were made by adding different concentrations of AgVO3...

The cytotoxic and genotoxic effects of commercial endodontic sealers (AH Plus, Sealer 26 and Endomethasone N) incorporated with nanostructured silver vanadate decorated with silver nanoparticles (AgVO3 – at concentrations 2.5, 5, and 10%) on human gingival fibroblast (HGF), and the silver (Ag+) and vanadium (V4+/V5+) ions release were evaluated. Cy...

Camptothecin (CPT) is a potent antitumor drug frequently used in studies of drug delivery systems. The poor water solubility and unfavourable pharmacokinetic conditions of CPT and the development of nanomaterials such as mesoporous silica nanoparticles (MSNs), graphene oxide (GO) and a new family of GO decorated with MSNs (GO-MSNs), motivated the p...

Indium have been widely investigated by scientists because of its several interesting properties and its use in different applications in the manufacture of TVs screens, computers, cell phones, solar panels, electroluminescent diodes (LEDs), organic electroluminescent diodes (OLEDs), DNA and antibody sensors, electrocatalysts, architectural glass c...

Graphene oxide (GO) is part of a new set of nanomaterials with particular characteristics related to its nanoscale size. Due to this feature, it presents high reactivity and other contaminants present in the environment could bind to them and affect its intrinsic toxicity. The metabolic effects of such nanomaterials and their combination with two c...

Nanostructured silver vanadate (NSV) materials have a great potential as an antibacterial agent. Here, we evaluate the effect of visible-light irradiation on the antibacterial activity of NSV materials. The material was synthesized from the precipitation reaction between ammonium vanadate and silver nitrate. The isolated solid was simultaneously ir...

The objective of this in vitro study was to investigate the effect of nanostructured silver vanadate decorated with silver nanoparticles (AgVO3) on antimicrobial activity, hardness, roughness, and adhesion of a soft denture liner. The antimicrobial efficacy of the Trusoft (Boswoth) liner incorporated with different concentrations of AgVO3 against E...

A study of impedance spectroscopy was done for the electrical characterization of pyrochlore materials. The experiment consisted of measurements of the dependence of the impedance of such systems with the temperature during heating (25 to 110 {\deg}C) and cooling (110 to 25 {\deg}C). The goal was to try to avoid the effect of humidity in the impeda...

Purpose: To evaluate the antimicrobial activity and physico-mechanical properties of an irreversible hydrocolloid in which nanostructured silver vanadate decorated with silver nanoparticles (AgVO3 ) was added at various concentrations (0% - control, 2.5%, 5%, and 10% by weight). Materials and methods: The agar diffusion method (n = 10) was used...

The incorporation of nanoparticles into endodontic sealers aims at increasing antimicrobial activity of the original material. Aim. The aim of this study is to incorporate the nanostructured silver vanadate decorated with silver nanoparticles (AgVO 3 , at 2.5%, 5%, and 10%) into three endodontic sealers and evaluate the antibacterial activity of fr...

We have performed the LiTaWO 6 vibrational studies for both Raman and infrared actives modes. Although we do not have crystalline samples, the study was conducted qualitatively, firstly comparing the sample with similar compounds in the literature, and secondly comparing both Raman and infrared spectra of the LiTaWO 6 compound. Although the procedu...

We have performed the LiTaWO$_6$ vibrational studies for both Raman and infrared actives modes. Although we do not have crystalline samples, the study was conducted qualitatively, firstly comparing the sample with similar compounds in the literature, and secondly comparing both Raman and infrared spectra of the LiTaWO$_6$ compound. Although the pro...

The study of the toxic effect of carbofuran and multiwalled carbon nanotubes (MWCNTs) on Astyanax ribeirae metabolism is of paramount importance due to the increasing use of this pesticide in agriculture and in the production of nanotubes within the material industry. This study aimed to evaluate the effects of carbofuran, MWCNT, and the combinatio...

Graphene oxide (GO) has been evaluated for application in environmental remediation and pollution control strategies. However, the side effects caused by the interactions of GO with classical pollutants in aquatic environments are still largely unknown. In this work, the ecotoxicological effects of GO, cadmium, zinc and the interactions between GO...

Graphene oxide (GO) and silver nanoparticles (AgNPs) can be formed into a hybrid nanomaterial, known as GOAg nanocomposite, which presents high antibacterial activity. The successful translation of this nanomaterial into medical use depends on critical information about its toxicological profile. In keeping with a Safe-by-design approach, we evalua...

The influence of Jahn-Teller (JT) distortion on the electrochemical behavior of LiMn 2 O 4 is not fully understood nowadays. This paper concerns the role that structural defects play in reducing the magnitude of JT distortion. Structural defects were induced in micrometric and nanometric LiMn 2 O 4 using 60 Co gamma radiation. Techniques such as X-...

In this work, we developed an integrative experimental design to investigate the long-term effects of two important classes of carbon nanomaterials with different dimensionalities (i.e., 1D oxidized multiwalled carbon nanotube, ox-MWCNT, and 2D graphene oxide, GO) on the development of the generalist insect Spodoptera frugiperda (Lepidoptera: Noctu...

The influence of LLTO (Li0.33La0.56TiO3) nanoparticles on the conducting properties of PEO (polyethylene oxide)8-LiClO4 polymer-salt complex electrolyte still remains not fully understood. This paper aims to establish the role of LLTO filler concentration, its morphology, agglomeration and charge nanoparticles surface on the ionic transport of (PEO...

Hydrothermally synthesized α-MoO3 nanoribbons were converted to MoS2 whilst retaining the same morphology by a solid–gas reaction at 800 °C in a H2S/H2/N2 atmosphere. In order to keep the nanoribbon morphology from the oxide in the sulfide, it was crucial to have a H2S stream during the whole heating process. Thereby, the first layer of sulfide is...

Objectives: This study characterized the microbial diversity of formed biofilm on the surface of acrylic resins modified with nanostructured silver vanadate decorated with silver nanoparticles (AgVO3) after incubation in human saliva. Design: Resin specimens prepared with AgVO3 at concentrations 0%, 1%, 2.5%, and 5% by either vacuum mixing or po...

In this work, graphene oxide (GO) was covalently functionalized with D-mannose (man-GO) using mannosylated ethylenediamine. XPS (C1s and N1s) confirmed the functionalization of GO through the binding energies at 288.2 eV and 399.8 eV, respectively, which are attributed to the amide bond. ATR-FTIR spectroscopy showed an increase in the amine bond in...

In this work, we developed and screened the potential anti-tumor activity of a nanocarrier based on graphene oxide (GO) and folic acid (FA) for the delivery of chemotherapy drugs. GO was synthesized by the graphite exfoliation process. FA was linked to PEG (4,7,10-trioxa-1,13-tridecanediamine) to form FA-PEG, followed by coupling to the GO surface....

Silver vanadates have been widely investigated because of their many interesting properties and their potential use in several applications. In addition to this, a large number of groups have investigated silver vanadates in the form of nanostructures. Here, we address first the synthesis and properties of nanosilver vanadate. Different techniques,...

Palladium nanoparticles decorated reduced graphene oxide (Pd-rGO) and palladium nanoparticles intercalated inside nitrogen doped reduced graphene oxide (Pd-NrGO) hybrids have been synthesized by applying a very simple, fast and economic route using microwave-assisted in-situ reduction and exfoliation method. The Pd-NrGO hybrids materials show good...

We have studied, by Raman spectroscopy, materials H1-xAgxTaWO6 and KTaWO6, both belonging to the pyrochlore system whose symmetry Fd3m (Oh 7). The experiments consisted in measurements of the Raman spectrum, at room temperature, on samples, before and after heat treatment. We have not performed photoinduced transformations studies on samples subjec...

In this work, industrial grade multi-walled carbon nanotubes (MWCNT) were coated with humic acid (HA) for the first time by means of a milling process, which can be considered an eco-friendly mechanochemical method to prepare materials and composites. The HA-MWCNT hybrid material was characterized by atomic force microscopy (AFM), scanning electron...

The current work refers to the development of a novel nanocomposite based on graphene oxide (GO) and mesoporous amino silica nanoparticles (H2N-MSNs) and its biological interaction with red blood cells (RBCs) and human blood plasma toward the investigation of nanobiointeractions. Silica nanoparticles and several graphene oxide-based materials are,...

Raw bovine plasma was used as a low cost, abundant and new source of biomolecules for interaction with multi-walled carbon nanotubes (MWCNTs) to produce long-term nanotube water dispersions by exploring the protein corona (PC) formation. The PC@MWCNT material obtained was subjected to a detailed physicochemical and biochemical characterization, and...

Procedimentos de oxidação química são comumente aplicados a nanotubos de carbono a fim de favorecer sua dispersão coloidal e interação com matrizes biológicas. Entretanto, estes métodos apresentam potenciais riscos ambientais e ocupacionais. Neste trabalho, pela primeira vez na literatura, nanotubos de carbono de paredes múltiplas comerciais (r-NTC...

MoO3 nanoribbons were studied under different pressure conditions ranging from 0 to 21GPa at room temperature. The effect of the applied pressure on the spectroscopic and morphologic properties of the MoO3 nanoribbons was investigated by means of Raman spectroscopy and scanning electron microscopy techniques. The pressure dependent Raman spectra of...

Objectives: This study evaluated the release of ions and the cytotoxicity of acrylic resins incorporated with silver vanadate decorated with silver nanoparticles (AgVO3 ). Background: The inhibition of the accumulation of microorganisms on the resins is critical in preventing diseases. However, the hypothesis is that the release of ions from the...

Bacterial adhesion and consequent biofilm formation are one the biggest hurdles in membrane-based technologies. Due to numerous problems associated with bacterial colonization on membrane surfaces, the development of new approaches to prevent microbial growth has been encouraged. Graphene oxide, produced by the chemical exfoliation of graphite, is...

The effect of heavy metal in fish has been the focus of extensive research for many years. However, the combined effect of heavy metals and nanomaterials is still a new subject that needs to be studied. The aim of this study was to examine histopathologic alterations in the gills of Nile tilapia ( Oreochromis niloticus) to determine possible effect...

Carbofuran is a nematicide insecticide with a broad spectrum of action. Carbofuran has noxious effects in several species and has been banned in the USA and Europe; however, it is still used in Brazil. Aquatic organisms are not only exposed to pesticides but also to manufactured nanoparticles, and the potential interaction of these compounds theref...

Mannosylation is a method commonly used to deliver nanomaterials to specific organs and tissues via cellular macrophage uptake. In this work, for the first time, we proposed a method that involves the binding of d-mannose to ethylenediamine to form mannosylated ethylenediamine, which is then coupled to oxidized and purified multiwalled carbon nanot...

Objective: The purpose of this study was evaluate, for the first time, the impact of incorporation of nanostructured silver vanadate (b-AgVO 3) in antibiofilm and mechanical properties of dental acrylic resins (poly(methyl methacrylate), PMMA). Design: The b-AgVO 3 was synthesized and characterized by X-ray diffraction (XRD), Fourier transform infr...

Objective: The purpose of this study was evaluate, for the first time, the impact of incorporation of nanostructured silver vanadate (β-AgVO3) in antibiofilm and mechanical properties of dental acrylic resins (poly(methyl methacrylate), PMMA). Design: The β-AgVO3 was synthesized and characterized by X-ray diffraction (XRD), Fourier transform inf...

Poly (L-latic acid) (PLLA) is a bioresorbable polymer widely used as a biomaterial, but its fragility can limit its use. An alternative is to produce polymer nanocomposites, which can enhance the mechanical properties of polymeric matrix, resulting in a material with differentiated properties. In this work, PLLA based nanocomposites containing 0.25...

Background Graphene oxide (GO) is a highly oxidized graphene form with oxygen functional groups on its surface. GO is an excellent platform to support and stabilize silver nanoparticles (AgNP), which gives rise to the graphene oxide-silver nanoparticle (GOAg) nanocomposite. Understanding how this nanocomposite interacts with cells is a toxicologica...

The current work describes the development of new mesoporous silica nanoparticles (MSNs) containing a high content of phenyl groups (hydrophobic species) inside the mesopores and externally functionalized with polyethylene glycol (PEG), a hydrophilic moiety, to provide biocompatibility and colloidal stability. The MSNs were encapsulated with curcum...

Membrane fouling is one of the major drawbacks that changes polymeric membrane performance. Biofouling has a series of effects, such as to reduce membrane permeability, to increase energy costs and to decrease membrane lifetime. Cellulose acetate (CA) membranes, containing different amounts of β-cyclodextrin stabilized silver nanoparticles (AgNP-β-...

Statement of problem: The accumulation of bacteria on the surface of dental prostheses can lead to systemic disease. Purpose: The purpose of this in vitro study was to evaluate the growth of Staphylococcus aureus and Pseudomonas aeruginosa on the surface of autopolymerizing (AP) and heat-polymerizing (HP) acrylic resins incorporated with nanostr...

Raman spectra of GO and GO-Ag nanocomposites. Abbreviation: GO, graphene oxide.

Ag 3d XPS spectrum of GO-Ag nanocomposite. Abbreviations: XPS, X-ray photoelectron spectroscopy; GO, graphene oxide.

XPS survey spectra of GO and GO-Ag nanocomposite. Note: (C 1s-carbon and O 1s-oxygen). Abbreviations: XPS, X-ray photoelectron spectroscopy; GO, graphene oxide.

(A) and (B), TEM images of bare AgNPs. (C) Particle size distribution of AgNPs. The size distribution was calculated by counting more than 500 nanoparticles in several AgNP images, using ImageJ software. Abbreviations: TEM, transmission electron microscopy; AgNPs, silver nanoparticles.

UV-vis absorption spectrum of bare AgNPs. Abbreviations: UV-vis, ultraviolet-visible; AgNPs, silver nanoparticles.

FTIR spectra of GO and GO-Ag nanocomposites. Abbreviations: FTIR, Fourier transform infrared; GO, graphene oxide.

Carbon nanotubes (CNT) have been studied for biomedical applications due to their unique properties. However, pristine CNT have structural features and impurities that can cause toxicity to biological systems. In this work, we describe a method to purify multiwalled carbon nanotubes (MWCNT) by chemical modification and subsequent attachment of hydr...

The interaction of promising nanoparticles with red blood cells (RBCs) is a critical point to be addressed in nanomedicine and nanotoxicology, and the hemolytic assay is a classical and common test used to evaluate such interactions and the consequent nanoparticle toxicity. In addition, the protein corona is an emergent concept in bionanoscience as...

The graphene sample GO:Single-layer graphene oxide, purity 99%, thickness 0.7-1.2 nm (AFM); ~300-800nm X&Y dimensions is the standard size <450 nm & 1-20 μm lateral dimensions. Cheap Tubes Inc., Bratleboro, USA was selected for our study. Exhaustive characterization of GO was afforded. It exhibited thermal stability over 60oC and it was suspended i...

Graphene oxide (GO) has been considered a promising filler material for building polymeric nanocomposites because of its excellent dispersibility and high surface area. In this work, we present the fabrication and characterization of transparent and ultraviolet (UV) shielding composite films based on GO and cellulose acetate (CA). GO sheets were fo...

The graphene sample GO:Single-layer graphene oxide, purity 99%, thickness 0.7-1.2 nm (AFM); ∼300-800nm X&Y dimensions is the standard size oC and it was suspended in deionized water after ultrasonication(1 mg/mL) (stable 10 days). All the biological fluids used in the different assays were used as control of the colloidal suspension stability. Then...

The zeta potential, isoelectric point, and agglomeration of Li0.5La0.5TiO3 (LLTO) nanoparticles dispersed in aqueous media at different ionic strengths have been studied. The zeta potential was determined from electrophoretic mobility measurements, according to Smoluchowski's equation, for Li0.5La0.5TiO3 suspensions in NaCl and KCl electrolytes wit...

Background Methicillin-resistant Staphylococcus aureus (MRSA) has been responsible for serious hospital infections worldwide. Nanomaterials are an alternative to conventional antibiotic compounds, because bacteria are unlikely to develop microbial resistance against nanomaterials. In the past decade, graphene oxide (GO) has emerged as a material th...

The burns treatment is difficult, uncomfortable for the patient, and expensive for health system. Due to antimicrobial properties of silver nanoparticles (AgNP), these particles can avoid bacterial infection in wound and accelerate the wound healing. Furthermore, the complexation of AgNP with enoxaparin (low molecular weight heparin) may improve th...

During the last ten years, graphene oxide has been explored in many applications due to its remarkable electro-conductivity, thermal properties and mobility of charge carriers, among other properties. As discussed in this review, the literature suggests that a total characterization of graphene oxide must be conducted because oxidation debris (synt...

Controlling the water quality has become an important issue nowadays, especially due to its contamination along the years which may cause significant damage to human health and in this context, lead deserves a great attention[1]. This work presents the results for lead detection in water using an Electrolyte-Insulator-Semiconductor (EIS) structure...

This experimental study evaluated the influence of the presence of lipopolysaccharide (LPS), a common bacterial endotoxin, on the nitric acid oxidised multiwalled carbon nanotubes (Ox-MWCNT) during the assessment of in vitro toxicity to splenocytes, an immune system cell isolated from BALB/c mice. The concentration of LPS was determined by Limulus...

The adhesion of biofilm on dental prostheses is a prerequisite for the occurrence of oral diseases. To assess the antimicrobial activity and the mechanical properties of an acrylic resin embedded with nanostructured silver vanadate (β-AgVO3). The minimum inhibitory concentration (MIC) of β-AgVO3 was studied in relation to the species Staphylococcus...

Abstract In the last few years, several nanomaterials with unique physicochemical properties have been developing. Specially, nano-sized materials such as silver and zinc nanoparticles, carbon nanotubes, and graphene oxide have been attracting great attention due to their potential as novel antimicrobial agents. Worldwide, the constant and indiscri...

The present invention relates to a process for producing single-walled (SWCNT), double-walled (DWCNT) or multi-walled (MWCNT) carbon nanotubes functionalized by the generation of carbanions and the use of elemental sulphur to obtain thiol (-SH) groups on the surface of said nanotubes (SWCNT-SH, DWCNT-SH, MWCNT-SH). The functionalized nanotubes (NTC...

Abstract Much of the extensive development of nanotechnology is related to nanomaterials. In this chapter nanomaterials are presented non-exhaustively, aiming to show that their definitions are still under construction. We present some families of nanomaterials with emphasis on quantum dots, carbon nanotubes, graphene, fullerene, inorganic nanotube...

A new approach for improving electrical and thermal contacts between multi-wall carbon nanotubes (MWCNTs) and metal electrodes by localized laser heating is presented in this work. The nanotubes were suspended, using the dielectrophoresis technique, over a gap of 1 μm width and 5 μm depth connecting the ends of the patterned electrodes. Subsequentl...

A hybrid system made of single-wall carbon nanotube bundles (average diameter of approximately 20 nm and length of several tens of nanometers) highly covered with gold nanoparticles (average diameter of 5 nm) was prepared through the functionalization of the nanotube surface with 4,4′-thiobisbenzenethiol molecules followed by the anchoring of gold...

tIn this work, we evaluate the efficiency of biosurfactants produced by Bacillus subtilis LSFM-05 for thedispersion of acid-treated multi-walled carbon nanotubes (CNT-LQES1) and the effect of dispersion ontoxicity testing with Daphnia similis. Carbon nanotubes are very hydrophobic materials and they readilyagglomerate in mineral water. As a result,...

This paper describes the preparation of a new precursor for incorporating phosphate into a LiMn2O4 spinel-like cathode material. This novel precursor is characterized using FTIR, UV–vis, ATD/TG/DSC, CHN elemental analyses, TEM–EDS and SEM–EDS techniques. The proposed strategy involves forming a Li–NH4–Mn(III)–citrate solution that introduces high q...

Description of a procedure of synthesis to obtain P- doped LiMn2O4

We report here that the surface topography of colloidal mesoporous silica nanoparticles (MSNs) plays a key role on their bionano-interactions by driving the adsorption of biomolecules on the nanoparticle through a matching mechanism between the surface cavities characteristics and the biomolecules stereochemistry. This conclusion was drawn by analy...

This work reports on preparation, characterization, and antibacterial activity of graphene oxide (GO) decorated with biogenic silver nanoparticles (Bio-AgNPs) produced by the fungus Fusarium oxysporum. This nanocomposite (Bio-GOAg) was prepared by an ex situ process through the physical mixture of a GO dispersion with the previously prepared Bio-Ag...

Preparation of nano-crystalline Li0.5La0.5TiO3 perovskite material using citrate nitrate redox reaction by the combustion technique is reported. The role of the ammonium nitrate concentration used to co-precipitate the Li0.5La0.5Ti-citrate precursor is revealed by ATD/TG, XRD, SEM-EDX and HRTEM techniques. Thermo-gravimetric analysis data show how...

Graphene oxide (GO) is a very promising material because it is easy to process, water-soluble, and chemically versatile due to the presence of oxygenated groups on its surface. GO has been used in different areas such as electronics, biosensing, and environmental remediation. To design efficient materials, especially for biosensing and for remediat...

Graphene and its derivatives are promising candidates for important biomedical applications because of their versatility. The prospective use of graphene-based materials in a biological context requires a detailed comprehension of the toxicity of these materials. Moreover, due to the expanding applications of nanotechnology, human and environmental...

Much of the extensive development of nanotechnology is related to nanomaterials. In this chapter nanomaterials are presented non-exhaustively, aiming to show that their definitions are still under construction. We present some families of nanomaterials with emphasis on quantum dots, carbon nanotubes, graphene, fullerene, inorganic nanotubes, and me...

The challenge of nanotoxicology implies development of new methods and improvements of current ones to study the interface of nanomaterials and toxicological science. The nanoscale of materials provides new insights regarding their effects to cells, tissues, and organisms. The blood biocompatibility of nanomaterials is in the light of medical appli...

Abstract Much of the extensive development of nanotechnology is related to nanomaterials. In this chapter nanomaterials are presented non-exhaustively, aiming to show that their definitions are still under construction. We present some families of nanomaterials with emphasis on quantum dots, carbon nanotubes, graphene, fullerene, inorganic nanotube...

Book Description: Exposure to nanosized particles during manufacture and use is likely to increase in the coming years in relation to the expanding applications of nanotechnology. The field and associated literature of nanotoxicology has also grown rapidly as a result of these developing risk factors. This book takes a systematic approach to the f...

Book Description: High Value Manufacturing is the result of the 6th International Conference on Advanced Research in Virtual and Rapid Prototyping, held in Leiria, Portugal, October 2013. It contains current contributions to the field of virtual and rapid prototyping (V&RP) and is also focused on promoting better links between industry and academi...

We evaluated local inflammatory activity of oxidized multiwalled carbon nanotubes in rat experimental models of acute inflammation (paw edema and hyperalgesia) by analyzing their toxicity in non-mesoendothelial tissues. Subcutaneous injection of the nanotubes induced paw edema, that was maximal in the first 2 h after administration at 0.1 mg/kg (43...

Although there are several studies reporting the promising biological efficiency of mesoporous silica nanoparticles (loaded with antitumoral drugs) against cancer cells and tumors, there are no reports on the influence of the bio-nano interface interactions on the molecular diffusion process occurring along their pores. In this context, we show her...

Um total de 160 tilápias do Nilo produzidas no Instituto de Pesca em Cananéia, litoral sul de São Paulo, com massa úmida média 0,57 g (± 0,60 g) e comprimento total médio 2,36 cm (± 0,30 cm) tiveram suas brânquias analisadas. Grupos de 10 peixes foram dispostos em 16 aquários com capacidade para 50L preenchidos com 20L de água declorada.Os grupos f...

In this study, we report an oxidative treatment of multiwalled carbon nanotubes (MWCNTs) by using nitric acid at different temperatures (25–175 °C). The analyzed materials have diameters varying from 10 to 40 nm and majority lengths between 3 and 6 μm. The characterization results obtained by different techniques (e.g., field emission scanning elec...

Nanomaterials are used in a wide spectrum of applications, including nanowires that are objects with at least one of its dimensions in the range of 1 to 100 nm. Recently, a new type of silver vanadate nanowire decorated with silver nanoparticles (SVSN-LQES1) with promising antimicrobial activity against different pathogenic bacteria was described....

Carbon nanotubes are promising nanostructures for many applications in materials industry and biotechnology. However, it is mandatory to evaluate their toxicity and environmental implications. We evaluated nitric acid treated multiwalled carbon nanotubes (HNO3-MWCNT) toxicity in Nile tilapia (Oreochromis niloticus) and also the lead (Pb) toxicity m...

Layered double hydroxides (LDHs) have been widely investigated due to their several applications in the material and biotechnology industries. The combination of silver nanoparticles with biocompatible LDH material can create a new hybrid material with new properties. In this work, biogenic silver nanoparticles (AgNPbio) were associated with Mg-Al...

This book compiles articles from the Smart Nanocomposites Journal. Topics discussed include two different chemical routes to obtain graphene or few-later graphite; gas sensors based on multiwall carbon nanotubes decorated with different metal oxides nanoparticles; mechanism of multi-wall nanotube nucleation based on Mullins-Sekerka instability; sel...