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Nanoscale Research Letters

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https://www.readbyqxmd.com/read/30341697/switching-failure-mechanism-in-zinc-peroxide-based-programmable-metallization-cell
#1
Firman Mangasa Simanjuntak, Sridhar Chandrasekaran, Chun-Chieh Lin, Tseung-Yuen Tseng
The impact of peroxide surface treatment on the resistive switching characteristics of zinc peroxide (ZnO2 )-based programmable metallization cell (PMC) devices is investigated. The peroxide treatment results in a ZnO hexagonal to ZnO2 cubic phase transformation; however, an excessive treatment results in crystalline decomposition. The chemically synthesized ZnO2 promotes the occurrence of switching behavior in Cu/ZnO2 /ZnO/ITO with much lower operation current as compared to the Cu/ZnO/ITO (control device)...
October 19, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30341558/preparation-and-magnetic-properties-of-nd-fm-fm-fe-co-ni-pa66-three-layer-coaxial-nanocables
#2
Xiaoru Li, Hongyan Li, Guojun Song, Zhi Peng, Lichun Ma, Chengzhen Meng, Yang Liu, Kaidi Ding
A new preparation method of three-layer coaxial nanocables has been developed in this work. Nd/FM (FM=Fe, Co, Ni)/PA66 three-layer coaxial nanocables were assembled successfully from outer to inner layer by layer. PA66 nanotubes which served as the outer shell were prepared by polymer solution wetting AAO template. Ferromagnetic metals and Nd were deposited into pre-prepared PA66 nanotubes to be served as the middle layer and inner core, respectively. The results show that the structure has effects on the magnetic properties, and the nanocable preparation allows each layer, length, and thickness of the nanocables to be tuned...
October 19, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30328537/autophagy-inhibitor-ly294002-and-5-fluorouracil-5-fu-combination-based-nanoliposome-for-enhanced-efficacy-against-esophageal-squamous-cell-carcinoma
#3
Ye Feng, Yongjian Gao, Dayu Wang, Zhonghang Xu, Weixuan Sun, Ping Ren
In this study, 5-fluorouracil (5-FU) and LY294002 (LY)-loaded PEGylated nanoliposome was prepared to target esophageal squamous cell carcinoma (ESCC). The particles were characterized in terms of physicochemical and biological parameters. The co-delivery of autophagy inhibitor and chemotherapeutic drug in a single carrier was successfully accomplished. The two components from 5-FU and LY-loaded PEGylated nanoliposome (FLNP) released in a controlled manner with LY relatively released faster compared to that of 5-FU...
October 17, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30327946/preparation-of-glycyrrhetinic-acid-liposomes-using-lyophilization-monophase-solution-method-preformulation-optimization-and-in-vitro-evaluation
#4
Tingting Liu, Wenquan Zhu, Cuiyan Han, Xiaoyu Sui, Chang Liu, Xiaoxing Ma, Yan Dong
In this study, glycyrrhetinic acid (GA) liposomes were successfully prepared using lyophilization monophase solution method. Preformulation studies comprised evaluation of solubility of soybean phosphatidylcholine (SPC), cholesterol, and GA in tert-butyl alcohol (TBA)/water co-solvent. The influences of TBA volume percentage on sublimation rate were investigated. GA after lyophilization using TBA/water co-solvent with different volume percentage was physicochemically characterized by DSC, XRD, and FTIR. The XRD patterns of GA show apparent amorphous nature...
October 16, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30324291/lyophilized-hybrid-nanostructured-lipid-carriers-to-enhance-the-cellular-uptake-of-verapamil-statistical-optimization-and-in-vitro-evaluation
#5
Arshad Ali Khan, Ibrahim M Abdulbaqi, Reem Abou Assi, Vikneswaran Murugaiyah, Yusrida Darwis
Verapamil is a calcium channel blocker and highly effective in the treatment of hypertension, angina pectoris, and other diseases. However, the drug has a low bioavailability of 20 to 35% due to the first pass effect. The main objective of this study was to develop hybrid verapamil-dextran nanostructured lipid carriers (HVD-NLCs) in an attempt to increase verapamil cellular uptake. The formulations were successfully prepared by a high-shear homogenization method and statistically optimized using 24 full factorial design...
October 15, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30315380/analog-rf-performance-of-t-shape-gate-dual-source-tunnel-field-effect-transistor
#6
Shupeng Chen, Hongxia Liu, Shulong Wang, Wei Li, Xing Wang, Lu Zhao
In this paper, a silicon-based T-shape gate dual-source tunnel field-effect transistor (TGTFET) is proposed and investigated by TCAD simulation. As a contrastive study, the structure, characteristic, and analog/RF performance of TGTFET, LTFET, and UTFET are discussed. The gate overlap introduced by T-shape gate can enhance the efficiency of tunneling junction. The dual-source regions in TGTFET can increase the on-state current (ION ) by offering a doubled tunneling junction area. In order to further improve the device performance, the n+ pocket is introduced in TGTFET to further increase the band-to-band tunneling rate...
October 12, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30315377/spin-and-orbital-rotation-of-plasmonic-dimer-driven-by-circularly-polarized-light
#7
Jiunn-Woei Liaw, Mao-Chang Huang, Hsueh-Yu Chao, Mao-Kuen Kuo
The plasmon-enhanced spin and orbital rotation of Au dimer, two optically bound nanoparticles (NPs), induced by a circularly polarized (CP) light (plane wave or Gaussian beam) were studied theoretically. Through the optomechanical performances of optical forces and torques, the longitudinal/transverse spin-orbit coupling (SOC) of twisted electromagnetic fields was investigated. The optical forces show that for the long-range interaction, there exist some stable-equilibrium orbits for rotation, where the stable-equilibrium interparticle distances are nearly the integer multiples of wavelength in medium...
October 12, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30315428/observation-of-extrinsic-photo-induced-inverse-spin-hall-effect-in-a-gaas-algaas-two-dimensional-electron-gas
#8
Jinling Yu, Xiaolin Zeng, Yumeng Wang, Lijia Xia, Shuying Cheng, Yonghai Chen, Yu Liu, Yunfeng Lai, Qiao Zheng
The inverse spin Hall effect induced by circularly polarized light has been observed in a GaAs/AlGaAs two-dimensional electron gas. The spin transverse force has been determined by fitting the photo-induced inverse spin Hall effect (PISHE) current to a theoretical model. The PISHE current is also measured at different light power and different light spot profiles, and all the measurement results are in good agreement with the theoretical calculations. We also measure the PISHE current at different temperatures (i...
October 11, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30311065/artesunate-loaded-and-near-infrared-dye-conjugated-albumin-nanoparticles-as-high-efficiency-tumor-targeted-photo-chemo-theranostic-agent
#9
Hainan Yang, Zaijia Liu, Xufeng Li, Zhenfeng Zhang, Deji Chen, Hui Lian
Herein, a tumor-targeted multifunctional theranostic agent was synthetized using a facile method, combining four clinically approved materials: artesunate (Arte), human serum albumin (HSA), folic acid (FA), and indocyanine green (ICG). The obtained nanocomposites (FA-IHA NPs) showed an excellent photo- and physiological stability. The ICG in the FA-IHA NPs was used not only for near infrared (NIR) fluorescence imaging, but also for photothermal and photodynamic (PTT-PDT) therapy under a single NIR irradiation...
October 11, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30311009/effect-of-bilayer-ceo-2-x-zno-and-zno-ceo-2-x-heterostructures-and-electroforming-polarity-on-switching-properties-of-non-volatile-memory
#10
Muhammad Ismail, Ijaz Talib, Anwar Manzoor Rana, Tahira Akbar, Shazia Jabeen, Jinju Lee, Sungjun Kim
Memory devices with bilayer CeO2-x /ZnO and ZnO/CeO2-x heterostructures sandwiched between Ti top and Pt bottom electrodes were fabricated by RF-magnetron sputtering at room temperature. N-type semiconductor materials were used in both device heterostructures, but interestingly, change in heterostructure and electroforming polarity caused significant variations in resistive switching (RS) properties. Results have revealed that the electroforming polarity has great influence on both CeO2-x /ZnO and ZnO/CeO2-x heterostructure performance such as electroforming voltage, good switching cycle-to-cycle endurance (~ 102 ), and ON/OFF ratio...
October 11, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30306413/enhanced-near-infrared-absorber-two-step-fabricated-structured-black-silicon-and-its-device-application
#11
Hao Zhong, Nasir Ilyas, Yuhao Song, Wei Li, Yadong Jiang
Silicon is widely used in semiconductor industry but has poor performance in near-infrared photoelectronic devices because of its high reflectance and band gap limit. In this study, two-step process, deep reactive ion etching (DRIE) method combined with plasma immersion ion implantation (PIII), are used to fabricate microstructured black silicon on the surface of C-Si. These improved surfaces doped with sulfur elements realize a narrower band gap and an enhancement of light absorptance, especially in the near-infrared range (800 to 2000 nm)...
October 10, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30306404/pullulan-based-nanoparticle-hsa-complex-formation-and-drug-release-influenced-by-surface-charge
#12
Liming Yuan, Yiting Cao, Qian Luo, Wenyu Yang, Xiaofeng Wu, Xiaoping Yang, Di Wu, Siyuan Tan, Ge Qin, Jia Zhou, Yue Zeng, Xinghua Chen, Xiaojun Tao, Qiufang Zhang
The nanomaterial composition of nanoparticles and their protein adsorption in the blood is of great significance in the design of drug-loaded nanoparticles. To explore the interaction between the different surface components of nanoparticles (NPs) and protein, we synthesized three kinds of pullulan NP polymers: cholesteric hydrophobically (CH) modified pullulan (CHP), CH-modified animated pullulan (CHAP), and CH-modified carboxylated pullulan (CHSP). Pullulan NPs were prepared by the dialysis method. Dynamic light scattering was used to determine the charge and size of the three NPs...
October 10, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30288628/efficient-photocatalysts-made-by-uniform-decoration-of-cu-2-o-nanoparticles-on-si-nanowire-arrays-with-low-visible-reflectivity
#13
Chien-Hsin Tang, Po-Hsuan Hsiao, Chia-Yun Chen
Highly uniformed decorations of Cu2 O nanoparticles on the sidewalls of silicon nanowires (SiNWs) with high aspect ratio were prepared through a two-step electroless deposition at room temperature. Morphology evolutions and photocatalytic performance of SiNWs decorated with aggregated and dispersed Cu2 O nanoparticles were unveiled, and the correlated photodegradation kinetics was identified. In comparison with the conventional direct loadings where the aggregated Cu2 O/SiNW structures were created, the uniform incorporation of Cu2 O with SiNWs exhibited more than three and nine times of improved photodegradation efficiency than the aggregated-Cu2 O/SiNWs and sole SiNWs, respectively...
October 4, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30288627/graphene-based-nanoscale-vacuum-channel-transistor
#14
Ji Xu, Zhuyan Gu, Wenxin Yang, Qilong Wang, Xiaobing Zhang
We report the fabrication and electrical performance of nanoscale vacuum channel transistor (NVCT) based on graphene. Ninety-nanometer-width vacuum nano-channel could be precisely fabricated with standard electron beam lithography process. The optimization and treatment of surface damage and adhesive residue on graphene are carried out by ultrasonic cleaning and thermal annealing. Additionally, in situ electric characteristics are directly performed inside a vacuum chamber of scanning electron microscope (SEM) with the nanomanipulator...
October 4, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30288625/facile-synthesis-of-nitrogen-doped-microporous-carbon-spheres-for-high-performance-symmetric-supercapacitors
#15
Zhongguan Liang, Hao Liu, Jianping Zeng, Jianfei Zhou, Hongjian Li, Hui Xia
Nitrogen-doped microporous carbon spheres (NMCSs) are successfully prepared via carbonization and KOH activation of phenol-formaldehyde resin polymer spheres synthesized by a facile and time-saving one-step hydrothermal strategy using triblock copolymer Pluronic F108 as a soft template under the Stöber-like method condition. The influence of the ethanol/water volume ratios and carbonation temperatures on the morphologies, pore structures and electrochemical performances of the prepared NMCSs are investigated systematically...
October 4, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30288620/seed-mediated-synthesis-of-tunable-aspect-ratio-gold-nanorods-for-near-infrared-photoacoustic-imaging
#16
Pengwei Li, Yiduo Wu, Dingding Li, Xiaoxiao Su, Cuixian Luo, Ying Wang, Jie Hu, Gang Li, Huabei Jiang, Wendong Zhang
Tunable-aspect ratio gold nanorods have been synthesized by a modified seed-mediated synthesis method. Ascorbic acid was employed as a shape controller to induce anisotropic growth, which made the aspect ratio of the synthesized gold nanorods range from 8.5 to 15.6. These nanorods possess tunable longitudinal surface plasmon resonance absorption band, covering a broad near-infrared (NIR) range, from ~ 680 to 1100 nm. When modified with thiol-polyethylene glycol (SH-PEG), the synthesized Au nanorods showed excellent biocompatibility and stability, which foreshadowed the great potential of their NIR application as photoacoustic contrast agent...
October 4, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30288619/efficient-trilayer-phosphorescent-organic-light-emitting-devices-without-electrode-modification-layer-and-its-working-mechanism
#17
Xiaomei Peng, Haiwei Feng, Jiaxin Zhang, Shihao Liu, Letian Zhang, Wenfa Xie
At present, numerous functional layers are introduced to improve the carrier injection and balance the carrier transport in organic light-emitting devices (OLEDs). Although it may be a good way to enhance the efficiency of devices, the introduction of functional layers would also result in extra process and long manufacture period. Actually, with the enrichment of material system, many appropriate materials could be chosen to share two or even more functions in OLEDs. Here, via impedance spectroscopy and transient electroluminescence analysis, di-[4-(N,N-ditolyl-amino)-phenyl] cyclohexane (TAPC) and 4,7-diphenyl-1,10-phenanthroline (Bphen) are demonstrated to serve as carrier injection and transport layers simultaneously...
October 4, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30288618/antimicrobial-and-cytotoxicity-effects-of-synthesized-silver-nanoparticles-from-punica-granatum-peel-extract
#18
Sandhanasamy Devanesan, Mohamad S AlSalhi, Radhakrishnan Vishnu Balaji, Amirtham Jacob A Ranjitsingh, Anis Ahamed, Akram A Alfuraydi, Fulwah Y AlQahtani, Fadilah S Aleanizy, Ahmed H Othman
To address the growing challenges from drug-resistant microbes and tumor incidence, approaches are being undertaken to phytosynthesize metal nanoparticles, particularly silver nanoparticles, to get remedial measure. In this study, an attempt has been made to utilize a major biowaste product, pomegranate fruit peel (Punica granatum), to synthesize silver nanoparticles. The silver nanoparticles (AgNPs) were synthesized using the aqueous extract of pomegranate peel. The formation of synthesized AgNPs was confirmed through UV-Vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) as well as through the change of the colorless aqueous solution to a dark brown solution...
October 4, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30284111/a-ppy-zno-functional-interlayer-to-enhance-electrochemical-performance-of-lithium-sulfur-batteries
#19
Fuxing Yin, Jun Ren, Yongguang Zhang, Taizhe Tan, Zhihong Chen
To enhance the electrochemical performance of the lithium/sulfur batteries, a novel interlayer was prepared by coating the slurry of PPy/ZnO composite onto the surface of a separator. Owing to a three-dimensional hierarchical network structure, PPy/ZnO composite serves as a polysulfide diffusion absorbent that can intercept the migrating soluble polysulfides to enhance the electrochemical performance of the Li/S batteries. The specific capacity of the cell with PPy/ZnO interlayer remained at 579 mAh g-1 after 100 cycles at 0...
October 3, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/30284110/enhanced-confinement-of-terahertz-surface-plasmon-polaritons-in-bulk-dirac-semimetal-insulator-metal-waveguides
#20
Yi Su, Qi Lin, Xiang Zhai, Ling-Ling Wang
A subwavelength terahertz plasmonic waveguide based on bulk Dirac semimetal (BDS)-insulator-metal (BIM) structure is investigated, which indicates that there is an optimized frequency range with the better confinement as well as lower loss. A broadband mode confinement up to λ0 /15 with a relatively low loss of 1.0 dB/λ0 can be achieved. We also show that two silicon ribbons introduced into the BIM waveguide can form a dynamically tunable filter tailoring terahertz surface plasmon polaritons in deep-subwavelength scale, which can be further exploited for the design of ultra-compact THz plasmonic devices with dynamical tunability...
October 3, 2018: Nanoscale Research Letters
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