Hanna Bandarenka

Belarusian State University of Informatics and Radioelectronics · Department of Research and Development

Citation: Bandarenka, H.; Burko, A.; Girel, K.; Laputsko, D.; Orel, E.; Mizgailo, A.; Sharopov, U.; Podelinska, A.; Shapel, U.; Pankratov, V.; et al. Improvement of Heat Dissipation in Ag/Ni Substrates for Testing Cu-TiO 2 /TiO 2-Modified Filters Using SERS Spectroscopy. Crystals 2023, 13, 749. https:// Abstract: Surface-enhanced Raman scattering (...

In present work, two types of substrates for the surface enhanced Raman scattering (SERS) spectroscopy based on silver-coated porous silicon (por-Si) and HfOx/por-Si are engineered. The por-Si samples are formed by electrochemical etching the monocrystalline silicon and have a mean pore diameter of 850 nm and a porous layer thickness of 5 µm. Depos...

In this study, we developed a filtering material for facial masks, which is capable of trapping and subsequent inactivation of bacteria under white light emitting diodes (LED) or sunlight irradiation. Such a functionality is achieved via the modification of the composite membrane based on porous polymer with photocatalytic (TiO2) and plasmonic (Ag)...

Dielectrophoresis (DEP) is a versatile tool for the precise microscale manipulation of a broad range of substances. To unleash the full potential of DEP for the manipulation of complex molecular-sized particulates such as proteins requires the development of appropriate theoretical models and their comprehensive experimental verification. Here, we...

Porous silicon (PS) is a promising material for nanostructure fabrication providing a precise control over its size, shape, and spatial distribution. This makes it an excellent candidate for constructing highly sensitive, reproducible, and low-cost platforms for surface enhanced Raman scattering (SERS) spectroscopy. In this work, we connect the PS...

We present Raman spectroscopy and quantum chemical computational study for model phospholipid membrane molecule dipalmitoylphosphatidylcholine (DPPC) mixed with cholesterol or melatonin at various concentrations. Utilizing a confocal Raman microspectroscopy setup, we capture a DPPC conformation state by evaluating the number of trans/gauche bonds u...

Porous silicon (PS) can be used as a loading template in sensing or as a matrix to develop nanoparticle arrays. We present a comprehensive study of PS morphology and optical properties before and after the pore opening process, including the determination of thickness, pore size, and pore density of PS layers, its surface wettability, and reflectiv...

Surface-enhanced Raman scattering (SERS) spectroscopy is one of the most prospective methods combining state-of-the-art nanomaterials and optical techniques for highly sensitive express-analysis and detection of organic and bioorganic objects in liquids and gases. Special programs have been recently started all over the world to bring the SERS-spec...

Surface‐enhanced Raman scattering (SERS) by biochemically relevant organic reporter molecules, spread out over a promising localized surface plasmon resonance (LSPR) structure of randomly arranged silver nanoscale particles (AgPs) of various dimensions and shape, was induced using tightly focused continuous wave (CW) 785‐nm laser radiation, and the...

In this work, surface enhanced Raman scattering (SERS) spectra of aspirin and ibuprofen molecules adsorbed on the surface of silver nets sputtered on porous silicon were collected and analyzed. The bands in the SERS-spectra were correlated in accordance with the type of molecular vibration. Predominantly chemical adsorption of the indicated drugs o...

Using laterally ordered arrays of noble metal nanocavities as SERS substrates has been examined theoretically and experimentally. Simulation of the distribution of the electric field at the surface of nanostructures (nanocavities) has been carried out. The simulation results showed that cavities can be formed not only in a metal layer but in semico...

A single-step ultrasonic method (20 kHz) is demonstrated for the complexation of acetylsalicylic acid (ASA)-ZnO-graphene oxide (GO) nanoparticles with an average size of <70 nm in aqueous solution. ASA-ZnO-GO more efficiently inhibits the growth of probiotic Escherichia coli strain M-17 and exhibits enhanced antioxidant properties than free ASA and...

Discovery of surface‐enhanced Raman scattering (SERS) followed by evolution of optical systems and nanoengineering approaches has paved a path to detection of essential organic molecules on solid SERS‐active substrates from solutions at concentrations attributed to single‐molecule ones, i.e. below 10 ‐15 M. However, in practical terms confident SER...

Silicon nanowires (SiNWs) were comprehensively characterized in dependence on conditions of their formation via metal (Ag) -assisted chemical etching (MACE) of monocrystalline Si. The Ag structures remained on/between SiNWs based on both n- and p-Si were found to promote surface enhancement of Raman scattering (SERS) from organic molecules adsorbed...

Lymph nodes (LNs) play a very important role in the spread of cancer cells. Moreover, it was noticed that the morphology and chemical composition of the LNs change in the course of cancer development. Therefore, finding and monitoring similarities between these characteristics of the LNs and tumor tissues are essential to improve diagnostics and th...

A single step ultrasonic method (20 kHz) is demonstrated for the formation of acetylsalicylic acid-Fe3O4-graphene oxide nanocomposites (~ 80 nm) in aqueous solution. The electronic molecular structure of these nanocomposites is stable in acidic or basic aqueous medium. Coating of these nanocomposites with polyvinyl alcohol (PVA) occurs through incr...

Получены толстые высокопористые плёнки с достаточно прочным кремниевым скелетом. Методами РЭМ и ASAP произведена оценка пористости, размера и глубины пор. По спектрам ФЛ установлены размеры кремниевых кристаллитов. Также построены зависимости изменения структурных параметров ПК от плотности тока и времени анодирования.

Anomalous optical properties of microscopically inhomogeneous dielectric films placed on a thick metal sublayer are investigated. We study the reflection, scattering, and absorption of the coherent electromagnetic radiation as a function of the incidence angle. Computer simulations show the existence of the incidence angle of the laser beam when th...

Breast cancer accounts for 11.6% of all cancer cases in both genders. Even though several diagnostic techniques have been developed, the mostly used are invasive, complex, time-consuming and can’t guarantee an early diagnosis, something that is key when it comes to the tumour treatment success rate. Exosomes are extracellular vesicles that carry bi...

Silvered porous silicon was utilized as an active substrate for a detection of small amounts of meldonium by surface enhanced Raman scattering (SERS) spectroscopy. We were able to detect the meldonium in its water solutions at the concentrations of 10−2–10−6M. Immersion of the silvered porous silicon in the meldonium solutions at the 10−4M concentr...

Here we present results of our research work on an electroless corrosive deposition of coinage metals on nanostructured silicon. Principal steps of nanostructured silicon fabrication and further deposition of metals allowing growth of metallic films controlled by dopant type of a silicon substrate, morphology of silicon skeleton and electroless dep...

Copper nanostructures demonstrating an activity in the surface-enhanced Raman scattering (SERS) spectroscopy were formed via electrochemical deposition of copper on porous aluminum oxide (PAO) and protected from oxidation by surface coverage with polyethylene glycol (PEG) and silver. The SERS measurements of 10[Formula: see text]-M 4-mercaptophenyl...

We registered surface enhanced Raman scattering (SERS) spectra of the human lactoferrin molecules adsorbed on a silvered porous silicon (por-Si) from 10−6–10−18 M solutions. It was found that the por-Si template causes a negative surface potential of silver particles and their chemical resistivity to oxidation. These properties provided to attract...

The most intensive surface plasmon resonance (SPR) band is typical for the metallic particles of 10–150 nm diameters. The SPR band of such nanoparticles is usually narrow and allows using just one laser (i.e. limited range of excitation wavelength) to achieve the maximal enhancement of electromagnetic field near metallic nanostructures caused by su...

An original approach to fabricate SERS-active nanovoids by immersion deposition of silver on macroporous silicon (macro-PS) template with pore diameters and depth ranging from 500 to 1000 nm is proposed. The procedure for the formation of nanostructured silver films in the layers of macro-PS was optimized. Silver particles of dimensions in the nano...

Porous silicon covered with metallic nanostructures has demonstrated significant potential over the last 15 years for surface-enhanced Raman spectroscopy (SERS), and the field is comprehensively reviewed. A range of porous silicon morphologies created via anodization, reactive ion etching, hydrothermal etching, and metal-assisted chemical etching (...

The present work gives an overview of the developments in surface-enhanced Raman scattering (SERS) with metal-coated porous silicon used as an active substrate. We focused this review on the research referenced to SERS-active materials based on porous silicon, beginning from the patent application in 2002 and enclosing the studies of this year. Por...

Here we present a review of our research work on so-called corrosive deposition of metals on porous silicon (PS). Principal steps of the nanostructured silicon fabrication and further metals’ deposition allowing growth of metal films completely inherit-ing morphological pattern of different types of PS are presented. It is shown, that imprinting of...

Silver dendrites and nanoparticles demonstrating activity in surface enhanced Raman scattering grown via immersion deposition on structured Si were found to detect DTNB adsorbed from its 10−16 and 10−12 M solutions on the Ag surfaces respectively.

A highly sensitive photonic sensor based on a porous silicon ring resonator was developed and experimentally characterized. The photonic sensing structure was fabricated by exploiting a porous silicon double layer, where the top layer of a low porosity was used to form photonic elements by e-beam lithography and the bottom layer of a high porosity...

Investigations of short peptides that can be used in the next phase of synthetic HIV1 vaccine development are an urgent goal, as well as investigations of peptides that can be used in immunological tests with the aim to check the titer of antibodies against the alpha helix 1 from the first conserved region of HIV1 gp120 that are known to cause anti...

Surface enhanced Raman spectroscopy (SERS) of fullerene C60 drop-deposited from the 1.410⁻⁴ M aqueous solutions on the silvered porous silicon (Ag/PS) is reported for the first time. The used concentration is found to be not detected by the ordinary Raman spectroscopy. It is shown that SERS-spectrum of the fullerene deposited from the air-aged solu...

Silver particles, predominantly with the size of 40–80 nm, were immersion deposited onto porous silicon to form substrates appropriate for the detection of organic molecules by surface-enhanced Raman scattering technique. These substrates have been demonstrated for the first time to provide detection of phospholipid molecules represented by dipalmi...

Представлены результаты, отражающие основные аспекты экспериментальных исследований по выявлению закономерностей формирования и изучению структурных и оптических свойств наноструктурированных пленок меди, получаемых методом химического осаждения на пористый кремний из растворов солей меди и фтористоводородной кислоты для их применения в процессе де...

Porous silicon covered with metallic nanostructures has demonstrated significant potential over the last 15 years for surface-enhanced Raman spectroscopy (SERS), and the field is comprehensively reviewed. A range of porous silicon morphologies created via anodization, reactive ion etching, hydrothermal etching, and metal-assisted chemical etching (...

Plasmonic nanostructures demonstrating an activity in the surface-enhanced Raman scattering (SERS) spectroscopy have been fabricated by an immersion deposition of silver nanoparticles from silver salt solution on mesoporous silicon (meso-PS). The SERS signal intensity has been found to follow the periodical repacking of the silver nanoparticles, wh...

Here we report the SERS spectroscopy study of the herring sperm DNA adsorbed on the silvered porous silicon. Porous silicon has been fabricated by an electrochemical anodic etching of a highly doped n-type silicon wafer. It has been shown that the following silver immersion deposition on porous silicon lead to the formation of a layer of silver nan...

In this paper, we present the results on study of formation regularities, morphology, composition and photoluminescence of porous silicon particles fabricated by the magnesiothermal reduction of different samples of biogenic silicon dioxide based on rice husk, bamboo husk and bamboo joints at 650 °C at argon atmosphere.

In this work, silicon nanowires (SiNWs) formed by the metal-assisted chemical etching (MACE) have been applied as templates for the fabrication of substrates demonstrating an activity in the surface enhanced Raman spec-troscopy (SERS-active substrates). A comparative study of the SERS-active substrates based on SiNWs covered with Ag nanoparticles (...

The authors report a formation of aluminium oxide and tantalum nitride films of 15 – 40 nm thickness on a macroporous silicon skeleton to a depth of 4.5 µm by an atomic layer deposition. The obtained structures are considered as templates for a fabrication of metal rods by an electrodeposition for MEMS and 3D integrated circuits metallization. 1. I...

The paper reports the results of our research work on activity in a surface enhanced Raman spectroscopy (SERS) of the substrates based on micro-, meso-, and macroporous silicon (PS). It is shown that the type of PS defines structural parameters of the depositing metal allowing to form silver dendrites, silver and copper nanoparticles (NPs), and sil...

This article presents the results on a fabrication of silicon nanowires by a two-step metal-assisted chemical etching. Morphological and optical properties of the obtained silicon nanostructures depending on the type and resistivity of the initial silicon wafer have been studied. In addition, we have used the silicon nanowires as templates for zinc...

The review reports on the results of our research work on nanostructured metal films onto porous silicon. Principal steps of the techniques allowing fabrication of metal films completely inheriting morphological pattern of different types of porous silicon are presented. It is shown, that giving of the nanostructured pattern to metal films by means...

Introduction Laser exitation at surface enhanced Raman spectroscopy (SERS) has been found to damage analyte molecules causing changes in their spectra and making it difficult to perform clear qualitative and quantitative analysis [1]. In the present work, we have prevented the destruction of different organic molecules during SERS analysis by their...

Tear sterility is mostly provided by lactoferrin (Lf) and lizocim (Lz) proteins. That is why careful control of concentrations of these proteins in tear is extremely important for the proper therapy of eye disease. There are several methods of physiological liquids analysis, but Raman scattering takes the special place among them, as it is non-inva...

Silver (Ag) dendrites have been grown on the macroporous silicon (macroPS) by an immersion deposition. It has been shown an initial stage of the Ag deposition occurs according to the Volmer-Weber mechanism of the island thin film growth due to an excess of the electrons of the Si atoms from the rough surface of the macroPS. On the other hand, a fur...

An immersion deposition of copper (Cu) on a porous silicon (PS) from an aqueous solution of the copper sulfate (CuSO4) and hydrofluoric acid (HF) has been performed. The PS based on n +-and p +-silicon (Si) wafers has been used to study the Cu deposition depending on the conductivity type of the initial Si substrate. The PS/n +-Si substrate has bee...

SERS-active substrates have been fabricated by an immersion plating of Ag on different kinds of porous silicon. The formation of the nanostructured Ag films on PSi has been optimized for maximum SERS enhancement. The elaborated PSi-based plasmonic materials have been used for sensitive analysis of tetrapyrrolic molecules, particularly photosensitiz...

MEMS technologies often require an electrochemical deposition of thick layers of metals (Me) with controllable adhesion to a Si wafer for their further full or partial transfer. Well-known Layer Transfer technology utilizing a sacrificial porous Si (PS) provides poor adhesion manageability. Moreover it is hard enough to perform the Me electrodeposi...

Ag and Cu nanoparticles formed by immersion deposition on mesoporous silicon were characterized by X-ray diffractometry and scanning electron microscopy. The localized surface plasmon resonance of the metallic structures was examined by ultraviolet-visible reflectance spectroscopy. The localized surface plasmon reso-nance of the Ag and Cu nanoparti...

Structural and magnetic properties of Ni nanowires (NWs) electrochemically deposited into pores of porous silicon (PS) template under the stationary galvanostatic regime have been investigated. Samples have been studied in detail by using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and magnetic measurements. SEM...

TITLE: Mesoporous silicon anodes for Li-ion batteries

TITLE: Porous silicon as a template for metals nanostructuring