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: 1.43

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 1.431
2013 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 1.25
Cited half-life 2.50
Immediacy index 0.12
Eigenfactor 0.00
Article influence 0.20
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
  • Conditions
    • Publisher's version/PDF cannot be used
  • Classification
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: We report electrical and optoelectrical properties of a cross-junction of two semiconducting nanowires. Semiconducting nanowires and their junction play an important role in nanonetwork device. By mechanically manipulating the nanowires, cross-junction nanodevices are fabricated on SiO2/Si substrate using VO2 and ZnO nanowires. These junctions are formed across prepatterned two-probe Au electrodes and contacted through Pt metal deposition. The cross-junction devices were studied using global and focused laser beam irradiation with a wavelength of 532 nm at sweeping bias and fixed external bias. Furthermore multi-junction in nanonetwork between VO2 and ZnO nanowires device is demonstrated as a viable photodetector for potential application.
    No preview · Article · Jan 2016 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: In this study, Si/TiO2 heterojunction nanotube arrays were successfully fabricated by a two-step process of anodization and electrodeposition method followed by annealing. Characterization techniques such as X-ray diffraction experiments (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) show that the TiO2 nanotubes were ∼500 nm in length, ∼80 nm in diameter and ∼16 nm in the tube wall thickness. Si nanoparticles were successfully filled into the TiO2 nanotubes to form Si/TiO2 heterojunction. From the result of photo-decomposition of rhodamine B (Rh.B), it was found that the Si/TiO2 nanotube composites show higher photocatalytic activity (∼1.78 times in kinetic constants) compared with TiO2 nanotubes. The formation of Si/TiO2 heterostructure improved the separation efficiency of the photo-generated electron–hole pairs and prolonged their lifetime, resulted in the enhanced photocatalytic activity.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: We report an efficient paper-based surface enhanced Raman scattering (SERS) substrate platform based on a filter paper loaded with Au porous nanospheres (Au PNSs). The Au PNSs with high electric near-field intensity enhancement were synthesized through a seed-mediated growth method. From the transmission electron microscopy (TEM) images, it can be found that the average diameter of the Au PNSs is about 55 nm. Due to the electrostatic interaction between the positively charged Au PNSs (cetyltrimethylammonium bromide-capped) and negatively charged filter paper composed of cellulose, the Au PNSs can be efficiently immobilized into a filter paper, fabricating a Au PNSs-paper substrate. The obtained Au PNSs-paper substrate is found to be highly SERS sensitive for 10 nM Rhodamine 6G and exhibit excellent reproducibility (∼6% relative standard deviation) and long term stability. All of these benefits suggest that such cost-efficient SERS substrate can be a really excellent choice for a variety of SERS applications.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: Nanodevices based on metasurfaces are drawing tremendous attention recently. Such devices take advantage of the peculiar properties of surface plasmon polaritons and normally have small volumes which enable high compatibility. Due to their abundant functionalities and good integration with current elements and components in photonics, metasurfaces have triggered extensive applications in a wide research range. Here, we review the recent development of novel metasurface designs and their great potential in plasmon-assisted nanophotonics.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: We report the growth of high-density vertically aligned zinc oxide (ZnO) nanorods (NRs) on sputtered non-oriented ZnO seed layers on silicon dioxide/silicon (SiO2/Si) substrates using an aqueous solution of zinc nitrate dehydrate and hexamethylenetramine by a hydrothermal process. ZnO seeds with porous-like surface structures help to provide appropriate surfaces or planes for Zn or ZnO x nucleation at the initial stage so that the subsequent growth of ZnO NRs in the vertical direction can be promoted. The effects of the molarity and temperature of the solution on the morphological and structural properties of the grown ZnO structures were studied. Vertically aligned ZnO NRs with a high density of approximately 5.00 × 109 cm–2 and a high aspect ratio of approximately 10 were achieved at a temperature of 90 °C and molarity of 30 mM. The structures grown at 30 mM for all tested growth temperatures show the smallest full width at half maximum (FWHM) values, suggesting the optimum molarity for the growth of thicker and denser ZnO NRs. It is revealed that excessively high molarity, i.e., 40 mM, seems to be unsuitable for promoting vertical growth because it tends to promote nucleations in other planes, resulting in the growth of highly dense polygonal structures or the coalescence of NRs as well as in reduced thickness. The results seem to indicate the optimum molarity and temperature for the growth of highly c-axis-oriented ZnO NRs on an untreated non-oriented seed.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: Epoxy (EP) coatings containing different mass fraction of modified graphene (G) and graphene oxide (GO) have been successfully prepared on the surface of cast irons. The anticorrosion performance of the coatings was studied by electrochemical polarization curve and electrochemical impedance spectroscopy in 3.5 wt% NaCl solution. The interfacial structure of the coatings was characterized by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results indicate that both G and GO could improve the anticorrosion performance of EP coatings effectively and their best mass fraction are 0.25% for G and 0.50% for GO. Furthermore, the anticorrosion performance of G-EP composite coating is better than GO-EP composite coating at the same mass fraction. Compare to G, XPS and SEM results indicate that GO exhibits better interfacial compatibility in EP. Finally, the inhibitive mechanism of G and GO was discussed based on the obtained results.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: In this report, the characterization of GaN layers grown on p-type Si (111) substrate by plasmaassisted molecular beam epitaxy was investigated. For different growth temperatures (750 °C, 800 °C and 850 °C) and N/Ga flux ratios (0.26, 0.46 and 0.92), we can find the GaN layers transition from nanocolumns to nanorods structures. During the epitaxy of GaN, nanocolumns in the thin films with poor crystal quality were obtained for the growth parameters of low substrate temperature or Ga-rich condition. However, the growth at high substrate temperature or N-rich condition formed GaN nanorods structure, and was beneficial to the crystallization of GaN layers with preferential orientation (0001). In the end, the possible growth mechanism of GaN nanocolumns and nanorods was discussed in the letter.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: This paper reports the controlled synthesis of orthorhombic wurtzite AgInS2 nanocrystals and the simulated calculation of their electronic structure. The experiment results show that the as-prepared sample is highly crystallized with an average diameter of 16.67 nm and it has strong absorption in the spectral range of 300 nm–700 nm. The simulated results show that the band gap of AgInS2 is 1.94 eV which is very close to the experiment results, and the simulated absorption curve has a very similar outline with that of experiment results.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: κ-Carrageenase from Pseudoalteromonas carrageenovora was immobilized onto carboxyl functionalized magnetite nanoparticles (CMNPs) by using glutaraldehyde as the coupling agent. The CMNPs and immobilized κ-carrageenase exhibited distinct magnetic response and superparamagnetic properties, as determined by vibrating sample magnetometry. X-ray diffraction indicated that the magnetic effect was attributable to Fe3O4. Analyses by scanning electron microscopy and transmission electron microscopy showed that the mean diameter of the CMNPs and the immobilized κ-carrageenase was 15 nm. Zeta potential and particle size analysis of the CMNPS and the immobilized κ-carrageenase showed excellent dispersion in deionized water. The immobilized enzyme activity and the recovery rate were determined to be 326.0 U · g–1 carrier and 46.9% respectively. The immobilized κ-carrageenase was used to convert κ-carrageenan into κ-carrageenan oligosaccharide. Hydrolysis products were identified by electrospray ionization time-of-flight mass spectrometry as disaccharides and tetrasaccharides. The results indicated that the immobilized κ-carrageenase can be used in the preparation of carrageenan oligosaccharides.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: Arsenic-doped MgZnO films were grown using plasma-assisted molecular beam epitaxy (MBE). The incorporation of arsenic was achieved by annealing the MgZnO films that were grown on GaAs (100) substrate. The films did not undergo phase separation and exhibited a high C-axis orientation, as determined using X-ray diffraction. The photoluminescence spectra of the samples annealed at 550 °C revealed an acceptable bound exciton peak at 3.400 eV when excited using a He–Cd laser (325 nm) at 10 K. The photoluminescence of the as-grown samples revealed a bound exciton peak at 3.410 eV when excited using the same conditions. It confirms that arsenic-doped MgZnO films were obtained and that the donor defects in the MgZnO films were effectively suppressed following diffusion of the arsenic.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: In this paper, DPAVBi and Ir(ppy)3 are introduced into yellow green organic light-emitting devices (OLEDs) as hole transport layer and guest material, respectively. The configuration of the device is ITO/NPB (20 nm)/DPAVBi (x nm)/CBP:Ir(ppy)3 (8 wt%, 10 nm)/TAZ (10 nm)/Alq3(40 nm)/Cs2CO3:Ag2O (20 wt%, 2 nm)/Al (100 nm). High performance yellow green OLEDs devices are obtained by two hole transport layers. The structure of the device is optimized by adjusting the thickness of DPAVBi. When the thickness of DPAVBi layer is 25 nm, the maximum current efficiency and power efficiency of the device are 68.13 cd/A and 30.58 lm/W (0.0122 mA/cm2), respectively. The highest luminance of the device is 21250 cd/m2 (256.44 mA/cm2).
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: A series of pyrazole-5-ones, potential candidates for nonlinear optical response, (NLO) was synthesized. Pyrazole-5-ones (theoretically occuring as azo-hydrazo tautomers in the solid state), labeled as Az i /AzH i , (i = 1–4), were characterized by elemental analysis, 1H-NMR and FTIR spectra. The analysis of molecular structure and frontier molecular orbitals HOMO-LUMO was performed using the GAMESS 2012 software. It was found that all compounds exist only as hydrazo tautomers, with a planar structure, responsible for nonlinear optical properties. The NLO behavior cannot be classified as in classical push-pull or π-conjugated molecules. The molecular polarizability (α), first-order hyperpolarizabilities β tot, dipole (μ tot) and quadrupole (Q) moments, were calculated. The NLO efficiency was assessed by the relationship between high β tot and low HOMO-LUMO energy gap. Conjugation discontinuity in the hydrazo planar tautomers is concretized in the highest value of β tot for AzH2, 17.49 × 10–30 esu and the lowest value for AzH4, 8.09 × 10–30 esu.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: CuO nanowires (CNWs) were prepared on copper plates by a thermal oxidation method under an oxygen gas flow of 200 sccm at 600 °C. The effect of growth time on the length of CNWs and thickness of CuO and Cu2O layer was investigated. The results indicated that the length of CNWs and thickness of Cu2O layer increased with prolonging growth time. Three different experiments were designed for the demonstration of stress driven growth mechanism of CNWs. SEM images showed that no CNWs were found in copper films with a thickness of 8 μm, and few CNWs grew on the copper plate annealed by welding gun in atmosphere condition for 10 min either. Based on the experimental results, persuasive evidences were provided for the stress-driven growth mechanism. Moreover, the location of NW (nanowire) root was also demonstrated by the morphology of copper plates after Ar sputtering.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: RF sputtered p-type ZnMgO films were successfully prepared by doping phosphorus ions using plasma immersion ion implantation technique for different implantation duration 10–70 sec and subsequent rapid thermal annealing at temperature range 700–1000 °C. Low-temperature (15 K) photoluminescence spectra revealed a highly dominating acceptor-bound exciton peak at 3.36 eV with minimum FWHM of 0.006 eV using Gaussian fitting for the sample implanted for 70 sec and annealed at 900 °C. Donor-bound-acceptor (DAP), free-electron-acceptor (FA), inelastic exciton–exciton scattering (XX) and free exciton (FX) peaks also appeared at 3.24, 3.28, 3.37 and 3.66 eV respectively. Room temperature Hall measurement system showed p-type conductivity for the implanted samples annealed at 800 and 900 °C. The highest hole concentration of 4.19 × 1016 cm–3 was achieved with mobility value of 5.4 cm2V–1 S–1. The PZn–2VZn complex which was a shallow acceptor in ZnMgO, responsible for p-type conduction in ZnMgO films. X-ray diffraction spectra confirmed the presence of the 〈002〉 peak for all the samples. Scanning electron microscopy measurement demonstrated the formation of homogenous surface with large size of dense grains of implanted ZnMgO film after annealing at 900 °C. The achievement of p-type Zn0.85Mg0.15O paves the way for the application of ZnMgO in the design of ultraviolet superlattice or quantum-well light-emitting diodes and other optoelectronic devices.
    No preview · Article · Oct 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: A novel oxide p-n heterojunction structure with n-type ZnO nanorods embedded in p-type CuO thin film was fabricated on an indium tin oxide-coated glass substrate by combining a hydrothermal synthesis method and a sputtering deposition method. The transport behavior and NO gas sensing properties of the p-CuO thin film/n-ZnO nanorods heterostructure were characterized. The oxide heterojunction structure exhibited a definite rectifying diode-like behavior at various temperatures ranging from room temperature to 250 °C. Forward current-voltage (I-V ) data revealed that the conduction under high forward bias becomes space-charge-limited and follows I ≈ V 1.9. When the oxide p-n heterojunction structure was exposed to the acceptor gas NO in dry air, an abrupt decrease in the forward diode current of the p-n junction was observed. The NO gas sensing response of the oxide heterojunction structure showed a maximum value at a comparatively low operating temperature of 180 °C and increased linearly with increasing NO gas concentration in the range of 5-30 ppm. Results indicate that the p-CuO thin film/n-ZnO nanorods heterostructure has significant potential applications for oxide electronics, including gas sensors.
    No preview · Article · Sep 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: Pure polyvinyl alcohol (PVOH or PVA) and composite PVOH and gold nanofibers were electrospun to form nonwoven mats. Aqueous solutions of the PVOH and gold nanoparticles were blended at various concentrations to achieve viscous solutions suitable for the electrospinning process. The concentrations were varied to obtain sub-micron and nanoscale fiber mats. Fiber mat morphology was analyzed using scanning electron microscopy (SEM). Gold nanoparticle content was verified using thermal gravimetric analysis (TGA) and Transmission Electron Microscopy (TEM). Gold nanoparticle size was measured using TEM and verified using Ultraviolet-Visible (UV-Vis) spectroscopy. The bulk chemistry and surface chemistry was analyzed using Fourier Transform Infra-red (FTIR) spectroscopy and contact angle analysis. The fiber morphology, chemical compositions and contact angle data show that these electrospun materials are suitable for applications including biosensing, biomedical and tissue engineering.
    No preview · Article · Sep 2015 · Nanoscience and Nanotechnology Letters
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    ABSTRACT: We report a novel single-step method for preparing noble Au nanoparticles by the electrical explosion of wires (EEW) in deionized (DI) water without any additives. The morphologies and compositions of the as-prepared powders were observed by field emission-scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). The sizes and lattice images of the particles were analyzed using high-resolution transmission electron microscopy (HR-TEM). The dispersion properties of the nanoparticles in DI water were evaluated using sedimentation photographs, a Turbiscan device, and zeta-potential measurements. The nanoparticles were typically spherical with a particle size of approximately 150 nm, depending on the explosion conditions. The as-prepared Au particles were not contaminated in the DI water during evaporation and condensation of the explosion process and exhibited extremely good crystallinity. The dispersion of Au nanoparticles obtained using 0.1 mm wire was stable for six months in DI water at both room temperature and at 40°C.
    No preview · Article · Sep 2015 · Nanoscience and Nanotechnology Letters