Nanoscience and Nanotechnology Letters

Publisher: American Scientific Publishers

Journal description

Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.

Current impact factor: 1.44

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 1.444
2012 Impact Factor 0.886
2011 Impact Factor 0.528

Impact factor over time

Impact factor
Year

Additional details

5-year impact 0.89
Cited half-life 1.60
Immediacy index 0.31
Eigenfactor 0.00
Article influence 0.21
Website Nanoscience and Nanotechnology Letters
ISSN 1941-4900
Document type Journal

Publisher details

American Scientific Publishers

  • Pre-print
    • Author cannot archive a pre-print version
  • Post-print
    • Author cannot archive a post-print version
  • Classification
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Two kinds of core/shell type Ag@Al2O3 and Ag@SiO2 nanocables were prepared by the chemical reduction of AgNO3 as Ag core and the hydrolysis of metal alkoxides as shell. The SEM, TEM, XRD, FTIR and UV-Vis analysis were used to characterize the microstructures and chemical characteristics of Ag@Mx Oy nanocables. Microstructure analysis by SEM and TEM showed that both of the obtained Ag@Al2O3 and Ag@SiO2 nanocables have typical core–shell structure. Transmission electron microscopy measurements revealed that the diameter of Ag is about 35 nm and the shell thickness is 5 nm. FT-IR patterns proved that Ag core and Mx Oy shell has corresponding to a diffraction peak and the absorption peak of the vibration. XRD patterns showed the presence of the noble metal (Ag) and the differences of the diffraction peak intensity, which indicated the presence of Mx Oy shell. UV-Vis spectra showed that the plasma resonance absorption of Ag@Mx Oy nanocables has a weak red shift, due to the scattering effect of the Mx Oy shell. These Ag@Mx Oy core/shell nanocables will gain increasing applications in nanoscale electronic, optoelectronic, and sensing devices.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1990
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    ABSTRACT: Through-silicon vias (TSVs) provide physical and electrical connectivity among the stacked dies in three-dimensional integration. Carbon nanotubes (CNTs) have been proposed as a promising material to the future interconnects due to their attractive properties. This letter investigates the thermo-mechanical characterization of single-walled carbon nanotube (SWCNT)-based TSV in (100) silicon. The thermal stress induced by SWCNT-based TSV is obtained by performing finite element method (FEM) simulation. And the keep-out zone (KOZ), the region surrounding TSV within which devices cannot be made for sake of reliability, is further evaluated for pMOS (p-type metal-oxide-semiconductor) and nMOS (n-type metal-oxide-semiconductor) devices aligned along the [100] and [110] directions. It is shown that, the KOZ of SWCNT-based TSV could reach nearly 4 m, which is not negligible although it is much smaller than that of Cu TSV. And it is suggested that, the [100] channel orientation is preferred for pMOS and [110] for nMOS, respectively, in order to minimize the KOZ.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1991
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    ABSTRACT: Glycine-assisted combustion method was used to synthesize the garnet Dy3Fe5O12 nanoparticles. The detailed chemical redox reaction of these garnet nanoparticles are discussed elaborately. The phase and purity of the samples determined using X-ray powder diffraction studies, reveals that the samples form an pure phase cubic crystal structure (space group, Ia3d) at 1100 °C with average crystallite size of 90–97 nm. FTIR confirms the formation of garnet type structure in the region of 500–700 cm–1 wavelength corresponding to the stretching vibration of metal-oxygen group. The chemical elements and oxidation states of these nanoparticles have been investigated by X-ray photoelectron spectroscopy analysis acquired with Al K radiation. The high resolution XPS spectrum of Dy 4d, Fe 2p and O 1s was analyzed. It reveals the presence of single oxidation state of Dy ion (Dy3+) and mixed valence state of Fe ions (i.e., Fe2+ and Fe3+). Scanning electron microscopy was used to study the surface morphology of these nanoparticles and shows spherical shaped grains. From M–H loop, the prepared samples exhibit ferromagnetic behavior with the higher value of M s due to the presence of Fe2+ ion. Therefore, the prepared samples are favorable for security and switching applications.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6):469-475. DOI:10.1166/nnl.2015.1967
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    ABSTRACT: The influences of montmorillonoid/calcium carbonate nanoparticles on polyethylene sports turf fibers are given in this work. When there is the 3 wt% addition of montmorillonoid nanoparticles in the polyethylene sports turf fibers, the wear amount, the tensile strength, elongation rate, and the limited oxygen index reach the values of 11.2 mg, 21.7 N, 151%, and 24.3%, respectively. The addition of calcium carbonate nanoparticles has obvious influence on the thermal shrinkage rate and mechanical property of polyethylene sports turf fibers. The polyethylene sports turf fibers have better properties if there is a surface modification to the calcium carbonate nanoparticles by silane coupling agent and hyperdispersant before the addition.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1997
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    ABSTRACT: Zn0.99Ce0.01O and Zn0.98Cu0.01Ce0.01O nanostructure powders have been successfully fabricated by sol–gel method. The X-ray diffraction (XRD) results showed that the Zn0.99Ce0.01O and Zn0.98Cu0.01Ce0.01O were single phase with the wurtzite structure of ZnO. The crystal quality of the Zn0.98Cu0.01Ce0.01O was found to improve compared to that of the Zn0.99Ce0.01O samples. X-ray photoelectron spectroscopy (XPS) revealed that the valence state of Ce didn't change after Cu doping. And the Cu ions doping induced an increase in the green emission was observed with incorporating of Cu from the photoluminescence (PL) spectroscopy results. Zn0.99Ce0.01O and Zn0.98Cu0.01Ce0.01O nanostructure powders showed the obvious hysteresis loops at room temperature and the saturation magnetization (Ms) increases with incorporating of Cu. These interesting magnetic properties were explained based on the defect-related model for ferromagnetism.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1995
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    ABSTRACT: In2O3 nanoparticles were prepared by solvothermal method. The structural properties and morphologies of the as-prepared product were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the obtained product was indexed to cubic structure In2O3 with an average crystallite size of 28.06 nm. The UV-light property was studied, which showed that the current of the sensor increased at least 5 orders of magnitude when the sensor was placed in the presence of the maximum UV irradiation (365 nm, 0.531 mW/cm2 ). The optimal operating temperature of the sensor was determined to 250 °C, the sensor's detection limit towards H2S was as low as 5 ppb at 250 °C. The response time and the recovery time was 2.7 min and 3.8 min at the concentration of 5 ppb, respectively. Moreover, the In2O3 nanoparticles showed a certain selective detection to H2S compared with the other gases, such as NO2, H2, NH3, CO and C2H6O. Finally, the sensing mechanism of the sensor towards H2S was also discussed.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1993
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    ABSTRACT: In order to comprehensively master the effect of ground granulated blast furnace slag (GGBFS) on cement hydrates from the nano-scale structure perspective, nanoindentation characteristics of cement with GGBFS have been investigated by elective solvent dissolution method, the equilibrium calculation of cementitious material hydration and nanoindentation tests. The results indicate that there are elastic modulus overlaps between GGBFS and calcium hydroxide (CH), and the used rule that there are no elastic modulus overlaps between hydrate phases and unhydrated phases is proved to be inaccurate; GGBFS can be distinguished from CH through the volume ratio of calcium-silicate-hydrates (C-S-H) and the unhydrated GGBFS; with the increase of GGBFS dosage, the volume fractions of high-density calcium-silicate-hydrates (HD C-S-H) and porosity show a tendency of increase, and the volume fractions of HD C-S-H in C-S-H increase also; however, the volume fractions of low-density calcium-silicate-hydrates (LD C-S-H) show a decrease tendency.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1992
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    ABSTRACT: We investigated the effect of uni-axial strain on different geometrical single-walled boron nitride nanotubes with different diameters and chiralities. In order to cover a wide range of possibilities in designing and fabricating pressure sensor devices, we applied uni-axial strain in both directions i.e., elongation and compression. We also investigated the relation between strain and the bond lengths when uni-axial strain is applied. Based on our calculations, all nanotubes under study followed the same trend with no significant effects of different diameters, chirality. In addition, stretching or compressing the nanotube will have a direct impact on the nanotube electrical properties as the quantum states available to electrons will be modified by strain which eventually modifies the nanotube conductivity.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1994
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    ABSTRACT: This work described a simple, controllable and green sensor for detection of dopamine (DA) by electropolymerization of p-aminobenzene sulfonic acid (p-ABSA) onto a glass carbon electrode (GCE) which modified with gold nanoparticles (AuNPs). The gold nanoparticles were deposited on the surface of the GCE by electrodeposition, and poly(p-aminobenzene sulfonic acid) film attached onto the gold nanoparticles by electropolymerization, forming an p-ABSA/AuNPs nanocomposite film-modified GCE (p-ABSA/AuNPs/GCE). It was found that this (p-ABSA/AuNPs/GCE) modified electrode showed good electrocatalytic activity toward dopamine (DA) and good specificity for the detection of DA without interference from ascorbic acid or uric acid. Differential pulse voltammetry was used for the electrochemical DA detection. The method of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were used to characterize modified electrodes. Under optimum conditions, the response peak current for the electrochemical sensor exhibited linear over the ranges of 0.1 to 100 μM (r = 0.9991), with a detection limit of 3.5 × 10–8 M (S/N = 3). The proposed method exhibits high sensitivity, good recovery and excellent reproducibility.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.1986
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    ABSTRACT: Vertically aligned forests of carbon nanotubes (CNTs) were grown on a quartz substrate using chemical vapor deposition. Shape memory nanocomposites were prepared by filling the aligned CNTs with polyurethane shape memory polymer (SMP). The aligned dense array of CNTs allows electric current passing through in the horizontal axis and therefore enables SMP nanocomposite electrically conductive. Furthermore, it functions analogously to a pillar heat sink thus improves convective electrothermal heat transfer of the SMP. Experimental results proved that the vertically aligned dense forests of CNTs have significantly improved the electro-thermal performance and resulted in a uniform temperature distribution inside the SMP.
    Nanoscience and Nanotechnology Letters 06/2015; 7(6). DOI:10.1166/nnl.2015.2001
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    ABSTRACT: Cr2O3 particles with different sizes and morphologies were synthesized in a sequence by changing the ratio of K2Cr2O7 to CrO3 in hydrothermal system. The raw materials were K2Cr2O7, HCHO and CrO3. With the decrease of the ratio of K2Cr2O7 to CrO3, there is a trend for the size to shorten. The ratio of 1 to 2 is the watershed to generate big sized partilces. As the ratio was 1:0, products were 220–680 micrometer monodispersed particles. The mechanism that K+ influences the size and morphology of the product has been discussed. Constituents of precursor were verified by FT-IR methods. Microstructures were observed on a scanning electron microscope and phase composition and the crystallinity were investigated by X-ray techniques.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1988
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    ABSTRACT: We report that Tanshinone IIA loaded bovine serum albumin nanoparticles promoted drug delivery of Tanshinone IIA into A549 cells and induced the higher cytotoxicity and apoptosis. Tanshinone IIA loaded bovine serum albumin nanoparticles were produced by dehydration method. The morphology, particle size and polydispersity index were evaluated and the encapsulation efficiency of drug and drug release in vitro were also analyzed. The cytotoxicity and cellular uptake of Tanshinone IIA loaded bovine serum albumin nanoparticles were also investigated. Our finding suggested that the obtained Tanshinone IIA loaded bovine serum albumin nanoparticles were monodispersed spheres with suitable average size and negative surface charge. The encapsulation efficiency of Tanshinone IIA in nanoparticles was 82.1 ± 5.1% and the release pattern showed a long and biphasic drug release. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide results showed that compared with free Tanshinone IIA, the viability of cells treated with Tanshinone IIA loaded bovine serum albumin nanoparticles was significantly decreased within 24 h. Fluorescent observations also demonstrated that Tanshinone IIA loaded bovine serum albumin nanoparticles were internalized into cells and spread throughout the interior of cells. Taken together, Tanshinone IIA loaded bovine serum albumin nanoparticles showed higher cell uptake and induced stronger prohibition of cells than free drug. It suggested that Tanshinone IIA loaded bovine serum albumin nanoparticles provided a potential way to enhance the using efficiency of antitumor drug.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1983
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    ABSTRACT: This paper presents a 60 GHz voltage controlled oscillator (VCO) for the unlicensed 60 GHz wave applications, based on a 65 nm CMOS process. The post-simulation results shows 1.66 mW output power, –91 dBc/Hz phase noise at 1 MHz offset is realized, and the consumption of the VCO core is 13.1 mW under 1.5 V supply voltage at 60 GHz. The tuning rang of the VCO is from 56.4 GHz to 63.4 GHz; 0.016 mm2 chip area is occupied, and the figure of merit (FOM) of this VCO is as high as –176.8 dBc/Hz.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1955
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    ABSTRACT: Micron-sized Cu2FeSnS4 single crystals were synthesized by molten salt method using CuS, FeS and SnS as raw materials and using CsCl as fluxing agent for the first time. The Cu2FeSnS4 single crystals were investigated by X-ray diffraction, Raman, X-ray photoelectron spectroscopy and UV-vis absorbance spectroscopy. The results showed that the Cu2FeSnS4 single crystals were having stannite structure with an average size about 50–100 μm and the band gap was about 1.45 eV.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1953
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    ABSTRACT: The resistive switching is an outstanding candidate for next-generation nonvolatile random-access memory device. In this work, resistive switching effect of Ag/GeO2/FTO device is demonstrated. In particular, the resistive switching characteristics can be enhanced by illumination. The device can maintain superior reversible stability over 100 cycles with an OFF/ON-state resistance ratio of about 103 under illumination at room temperature. This study is useful for exploring the promising light-controlled resistive switching device.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1962
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    ABSTRACT: Naturally occurring compounds are currently emerging as new antibacterial materials for the treatment of Staphylococcus aureus infections. Lysostaphin (Lst), identified in S. simulans, has specific antibacterial activities against S. aureus. In this study, Lst was functionalized on the surfaces of gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs) to develop novel antibacterial agents against methicillin-resistant S. aureus (MRSA). The newly prepared NPs were characterized using UV-visible spectrophotometry and high-resolution transmission electron microscopy. The average diameters of the NPs were 5.50–16.32 nm, depending on the functionalization process. The Lst-functionalized AuNPs (Lst-AuNPs) exhibited slightly higher antibacterial activities against MRSA than did the Lst-functionalized AgNPs (Lst-AgNPs). Lst-functionalized metallic NPs are a promising new antibacterial platform for combating MRSA bacterial infections. The novelty of the current study is that the newly prepared NPs possess the lytic action of Lst on S. aureus cell walls, which is advantageous for specifically targeting MRSA.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1954
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    ABSTRACT: In this paper, the durability and microstructure of cement-based composites doped with multi-walled carbon nanotubes (MWNTs) were investigated with low MWNTs concentration of 0, 0.05%, 0.1% and 0.15% by weight of cement at 28 days. Ultrasonic processing and a commercially surfactant (Gum Arabic, (GA)) were utilized to achieve homogenous MWNTs suspensions. Chloride ion penetration resistance, sulfate attack resistance, and scanning electron microscopy (SEM) were used to characterize the durability of cement-based composites with MWNTs. Compared with the reference sample, the addition of MWNTs improved the chloride ion penetration resistance performance, sulfate attack resistance and microstructure of cement composites. The 0.1% weight fraction of MWNTs obtained excellent durability among the composites. The embedded MWNTs acted as bridges and networks across the voids and cracks in matrix, which guaranteed the load-transfer in case of tension.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1979
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    ABSTRACT: In this work, we have theoretically studied the changes in electrical properties of two different geometrical structures of carbon nanotubes upon oxygen doping. We used different doping mechanisms to study band structure variations of the doped structures. Doping carbon nanotubes with oxygen atoms created new band levels in the band structure and as a consequence an up shift of the Fermi level. The new band levels are located around the middle of the band gap of pristine carbon nanotubes, whereas filling up the lowest conduction bands cause the up shift of the Fermi level. The number of new band levels is directly correlated to different dopant concentrations. The new peaks appeared in the density of states are stemmed from the new bands in the band gap region. These new bands are solely attributed to doping carbon nanotubes with oxygen atoms. Compared to recently reported experimental studies our findings are in good agreement with the measured electrical characteristics of carbon nanotubes gas sensors based on transistors. Finally we simulated Raman spectroscopy for doped and un-doped nanotube samples and investigated the variations of frequency modes. We also studied the changes of the intensity spectra for both G+ and D modes.
    Nanoscience and Nanotechnology Letters 05/2015; 7(5). DOI:10.1166/nnl.2015.1956