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Nanoscale Research Letters

Jian Lv, Ting Zhang, Peng Zhang, Yingchun Zhao, Shibin Li
As a widely used semiconductor material, silicon has been extensively used in many areas, such as photodiode, photodetector, and photovoltaic devices. However, the high surface reflectance and large bandgap of traditional bulk silicon restrict the full use of the spectrum. To solve this problem, many methods have been developed. Among them, the surface nanostructured silicon, namely black silicon, is the most efficient and widely used. Due to its high absorption in the wide range from UV-visible to infrared, black silicon is very attractive for using as sensitive layer of photodiodes, photodetector, solar cells, field emission, luminescence, and other photoelectric devices...
April 19, 2018: Nanoscale Research Letters
Hsien-Sheng Lin, Jen-Bin Shi, Cheng-Ming Peng, Bo-Chi Zheng, Fu-Chou Cheng, Ming-Way Lee, Hsuan-Wei Lee, Po-Feng Wu, Yi-Jui Liu
In this study, alpha nickel sulfide (α-NiS) nanosphere films have been successfully synthesized by electroplating the nickel nanosheet film on the indium tin oxide (ITO) glass substrate and sulfuring nickel-coated ITO glass substrate. First, we electrodeposited the nickel nanosheet films on the ITO glass substrates which were cut into a 0.5 × 1 cm2 size. Second, the nanosheet nickel films were annealed in vacuum-sealed glass ampoules with sulfur sheets at different annealing temperatures (300, 400, and 500 °C) for 4 h in vacuum-sealed glass ampoules...
April 19, 2018: Nanoscale Research Letters
Carlos A P Bastos, Nuno Faria, Angela Ivask, Olesja M Bondarenko, Anne Kahru, Jonathan Powell
Bacterial resistance to antimicrobial therapies is an increasing clinical problem. This is as true for topical applications as it is for systemic therapy. Topically, copper ions may be effective and cheap antimicrobials that act through multiple pathways thereby limiting opportunities to bacteria for resistance. However, the chemistry of copper does not lend itself to facile formulations that will readily release copper ions at biologically compatible pHs. Here, we have developed nanoparticulate copper hydroxide adipate tartrate (CHAT) as a cheap, safe, and readily synthesised material that should enable antimicrobial copper ion release in an infected wound environment...
April 19, 2018: Nanoscale Research Letters
Shijing Xu, Jingyao Wang, Jiazhong Wu, Qingjie Liu, Chengzhen Sun, Bofeng Bai
Oil wettability in the water-oil-rock systems is very sensitive to the evolution of surface charges on the rock surfaces induced by the adsorption of ions and other chemical agents in water flooding. Through a set of large-scale molecular dynamics simulations, we reveal the effects of surface charge on the oil contact angles in an ideal water-decane-silicon dioxide system. The results show that the contact angles of oil nano-droplets have a great dependence on the surface charges. As the surface charge density exceeds a critical value of 0...
April 19, 2018: Nanoscale Research Letters
A-Long Yao, Xue-Feng Wang, Yu-Shen Liu, Ya-Na Sun
We have studied the electronic structure and the current-voltage (I-V) characteristics of one-dimensional InSe nanoribbons using the density functional theory combined with the nonequilibrium Green's function method. Nanoribbons having bare or H-passivated edges of types zigzag (Z), Klein (K), and armchair (A) are taken into account. Edge states are found to play an important role in determining their electronic properties. Edges Z and K are usually metallic in wide nanoribbons as well as their hydrogenated counterparts...
April 18, 2018: Nanoscale Research Letters
Ning Li, Meng-Meng Jie, Min Yang, Li Tang, Si-Yuan Chen, Xue-Mei Sun, Bo Tang, Shi-Ming Yang
Heparanase (HPA) is ubiquitously expressed in various metastatic malignant tumors; previous studies have demonstrated that HPA was a potential tumor-associated antigen (TAA) for tumor immunotherapy. We sought to evaluate the feasibility of HPA as a common TAA for magnetic resonance imaging (MRI) of tumor metastasis and its potential application in tumor molecular imaging. We prepared a targeted probe based on magnetic gold nanoparticles coupled with an anti-HPA antibody for the specific detection of HPA by MRI...
April 18, 2018: Nanoscale Research Letters
Enqi Su, Wensheng Gao, Xinjun Hu, Caicai Zhang, Bochao Zhu, Junji Jia, Anping Huang, Yongxiao Bai
Reduced graphene oxide/SiO2 (RGO/SiO2 ) serving as a novel spherical support for Ziegler-Natta (Z-N) catalyst is reported. The surface and interior of the support has a porous architecture formed by RGO/SiO2 sandwich structure. The sandwich structure is like a brick wall coated with a graphene layer of concreted as skeleton which could withstand external pressures and endow the structure with higher support stabilities. After loading the Z-N catalyst, the active components anchor on the surface and internal pores of the supports...
April 16, 2018: Nanoscale Research Letters
Sergii Golovynskyi, Oleksandr I Datsenko, Luca Seravalli, Giovanna Trevisi, Paola Frigeri, Ivan S Babichuk, Iuliia Golovynska, Junle Qu
Photoelectric properties of the metamorphic InAs/In x Ga1 - x As quantum dot (QD) nanostructures were studied at room temperature, employing photoconductivity (PC) and photoluminescence spectroscopies, electrical measurements, and theoretical modeling. Four samples with different stoichiometry of In x Ga1 - x As cladding layer have been grown: indium content x was 0.15, 0.24, 0.28, and 0.31. InAs/In0.15 Ga0.85 As QD structure was found to be photosensitive in the telecom range at 1.3 μm. As x increases, a redshift was observed for all the samples, the structure with x = 0...
April 16, 2018: Nanoscale Research Letters
Huihui Wu, Shihang Zhao, Lei Han
To explore the mechanism of cellulose acetate (CA)/thermoplastic polyurethane (TPU) on the fabrication of helical nanofibers, a series of experiments were conducted to find the optimum spinning conditions. The experimental results show that the CA (14 wt%, DMAc/acetone, 1/2 volume ratio)/TPU2 (18 wt%, DMAc/acetone, 3/1 volume ratio) system can fabricate helical nanofibers effectively via co-electrospinning. We focus on the interfacial interaction between the polymer components induced by the polymer structure and intrinsic properties, including solution properties, hydrogen bonding, and miscibility behavior of the two solutions...
April 16, 2018: Nanoscale Research Letters
Caihong Jia, Jiachen Li, Guang Yang, Yonghai Chen, Weifeng Zhang
Asymmetric resistive switching processes were observed in BaTiO3 /Nb:SrTiO3 epitaxial heterojunctions. The SET switching time from the high-resistance state to low-resistance state is in the range of 10 ns under + 8 V bias, while the RESET switching time from the low-resistance state to high-resistance state is in the range of 105  ns under - 8 V bias. The ferroelectric polarization screening controlled by electrons and oxygen vacancies at the BaTiO3 /Nb:SrTiO3 heterointerface is proposed to understand this switching time difference...
April 13, 2018: Nanoscale Research Letters
Jae Hyun Nam, So-Yeon Kim, Hasoo Seong
Synergistic effects of multiple drugs with different modes of action are utilized for combinatorial chemotherapy of intractable cancers. Translation of in vitro synergistic effects into the clinic can be realized using an efficient delivery system of the drugs. Despite a few studies on nano-sized liposomes containing erlotinib (ERL) and doxorubicin (DOX) in a single liposome vesicle, reliable and reproducible preparation methods as well as physicochemical characteristics of a non-PEGylated nanoliposome co-encapsulated with ERL and DOX have not been yet elucidated...
April 13, 2018: Nanoscale Research Letters
Kateryna Hubenko, Svetlana Yefimova, Tatyana Tkacheva, Pavel Maksimchuk, Igor Borovoy, Vladimir Klochkov, Nataliya Kavok, Oleksander Opolonin, Yuri Malyukin
It this letter, we report the study of free radicals and reactive oxygen species (ROS) generation in water solutions containing gadolinium orthovanadate GdVO4 :Eu3+ nanoparticles (VNPs) and their complexes with methylene blue (MB) photosensitizer. The catalytic activity was studied under UV-Vis and X-ray irradiation by three methods (conjugated dienes test, OH· radical, and singlet oxygen detection). It has been shown that the VNPs-MB complexes reveal high efficiency of ROS generation under UV-Vis irradiation associated with both high efficiency of OH· radicals generation by VNPs and singlet oxygen generation by MB due to nonradiative excitation energy transfer from VNPs to MB molecules...
April 13, 2018: Nanoscale Research Letters
D Kołodyńska, M Gęca, E Skwarek, O Goncharuk
The novel organic-inorganic biohybrid composite adsorbent was synthesized based on nanosized silica-titania modified with alginate within the development of effective adsorbent for heavy metal ions. Effects of metal species Cu(II), Zn(II), Cd(II), and Pb(II); concentrations; pH; temperature; and adsorption onto titania-coated silica (ST20) initial or modified by sodium alginate (ST20-ALG) were studied. The equilibrium and kinetic data of metal ions adsorption were analyzed using Langmuir and Freundlich adsorption models and kinetic models: pseudo first order, pseudo second order, intraparticle kinetic model, and Elovich...
April 12, 2018: Nanoscale Research Letters
Yani Hua, Juan Xiao, Qinqin Zhang, Chang Cui, Chuan Wang
A new magnetic nano-adsorbent, polycatechol modified Fe3 O4 magnetic nanoparticles (Fe3 O4 /PCC MNPs) were prepared by a facile chemical coprecipitation method using iron salts and catechol solution as precursors. Fe3 O4 /PCC MNPs owned negatively charged surface with oxygen-containing groups and showed a strong adsorption capacity and fast adsorption rates for the removal of cationic dyes in water. The adsorption capacity of methylene blue (MB), cationic turquoise blue GB (GB), malachite green (MG), crystal violet (CV) and cationic pink FG (FG) were 60...
April 12, 2018: Nanoscale Research Letters
Li Zhang, Yaoming Liu, Hanyu Zheng, Wenbin Zhu, Min Zhang, Linbo Zhang, Peiheng Zhou, Haiyan Chen, Xin Wang, Haipeng Lu, Jianliang Xie, Longjiang Deng
In this paper, we fabricated a series of FeCoBSi multistoried patterned magnetic films with different thickness by traditional UV lithography method and DC sputtering deposition. Broad resonance band phenomenon was observed during high frequency property characterization, with full width half maximum (FWHM) of 4 GHz when the film thickness is 45 nm. The broad resonance band effect was contributed to the existence of multiple resonance peaks due to different stripe width of the combined stripe pattern, which induced distinguish shape anisotropic field in each stripe...
April 12, 2018: Nanoscale Research Letters
Oleg V'yunov, Anatolii Belous, Sofiia Kobylianska, Leonid Kovalenko
The effect of starting reagents (PbI2:{CH3 NH3 I + CH3 NH3 Cl}) with different ratios in raw solutions on the microstructure of films of organic-inorganic perovskites CH3 NH3 PbI3-x Clx , as well as on the electrical properties, has been investigated. It was found that the crystallinity is increased sharply when the ratio of the starting reagents increases from 1:1 to 1:2 and is changed slightly with a further increase of ratio to 1:3. It is shown that when the ratio of starting reagents varies, the morphology of the films changes; at a ratio of 1:1, the films consist of needle-like particles, and when the ratio is increased, particles become roundish and then faceted...
April 12, 2018: Nanoscale Research Letters
Jakub Siegel, Kamil Záruba, Václav Švorčík, Kristýna Kroumanová, Lenka Burketová, Jan Martinec
Nowadays, due to a wide range of applications of nanoparticles (NPs) in many industrial areas, accumulations of those entities in environment pose a great risk. Owing to their inertness, noble metal NPs may remain in contaminated soils nearly unchanged for long time. Within this context, size-, shape-, and concentration-dependent uptake of particles by plants belongs to unexplored area. In this work, we present water solutions of biologically friendly synthesized spherical AuNPs with pretty narrow size distribution in size range from 10 to 18 nm...
April 10, 2018: Nanoscale Research Letters
V Onesto, M Villani, M L Coluccio, R Majewska, A Alabastri, E Battista, A Schirato, D Calestani, N Coppedé, M Cesarelli, F Amato, E Di Fabrizio, F Gentile
Diatom shells are a natural, theoretically unlimited material composed of silicon dioxide, with regular patterns of pores penetrating through their surface. For their characteristics, diatom shells show promise to be used as low cost, highly efficient drug carriers, sensor devices or other micro-devices. Here, we demonstrate diatom shells functionalized with gold nanoparticles for the harvesting and detection of biological analytes (bovine serum albumin-BSA) and chemical pollutants (mineral oil) in low abundance ranges, for applications in bioengineering, medicine, safety, and pollution monitoring...
April 10, 2018: Nanoscale Research Letters
Ashajyothi C, Harish K Handral, Chandrakanth Kelmani R
During the present time, anti-microbial features of copper (Cu) and zinc oxide (ZnO) nanoparticles (NPs) are extensively used to combat the growth of pathogenic microbes. CuNPs and ZnONPs are recurrently used in cosmetics, medicine and food additives, and their potential for toxic impacts on human and ecosystem is of high concern. In this study, the fate and toxicity of 16- to 96-nm-ranged biosynthesized copper (Bio-CuNPs) and zinc oxide (Bio-ZnONPs) was assessed in male Wistar rats. In vivo exposures of the two nanoparticles are achieved through two different administration routes namely, intraperitoneal (i/p) and intravenous (i/v) injections...
April 3, 2018: Nanoscale Research Letters
Chunyang Zhang, Lingzhi Chen, Yingjie Zhu, Zisheng Guan
This paper reports inverted pyramid microstructure-based single-crystalline silicon (sc-Si) solar cell with a conversion efficiency up to 20.19% in standard size of 156.75 × 156.75 mm2 . The inverted pyramid microstructures were fabricated jointly by metal-assisted chemical etching process (MACE) with ultra-low concentration of silver ions and optimized alkaline anisotropic texturing process. And the inverted pyramid sizes were controlled by changing the parameters in both MACE and alkaline anisotropic texturing...
April 3, 2018: Nanoscale Research Letters
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