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Nanoscale Research Letters

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https://www.readbyqxmd.com/read/28228008/integration-of-highly-strained-sige-in-source-and-drain-with-hk-and-mg-for-22%C3%A2-nm-bulk-pmos-transistors
#1
Guilei Wang, Jun Luo, Changliang Qin, Renrong Liang, Yefeng Xu, Jinbiao Liu, Junfeng Li, Huaxiang Yin, Jiang Yan, Huilong Zhu, Jun Xu, Chao Zhao, Henry H Radamson, Tianchun Ye
In this study, the integration of SiGe selective epitaxy on source/drain regions and high-k and metal gate for 22 nm node bulk pMOS transistors has been presented. Selective Si1-x Ge x growth (0.35 ≤ × ≤ 0.40) with boron concentration of 1-3 × 10(20) cm(-3) was used to elevate the source/drain. The main focus was optimization of the growth parameters to improve the epitaxial quality where the high-resolution x-ray diffraction (HRXRD) and energy dispersive spectrometer (EDS) measurement data provided the key information about Ge profile in the transistor structure...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228007/unit-with-fluidized-bed-for-gas-vapor-activation-of-different-carbonaceous-materials-for-various-purposes-design-computation-implementation
#2
Eugene Strativnov
We propose the technology of obtaining the promising material with wide specter of application-activated nanostructured carbon. In terms of technical indicators, it will stand next to the materials produced by complex regulations with the use of costly chemical operations. It can be used for the following needs: as a sorbent for hemosorption and enterosorption, for creation of the newest source of electric current (lithium and zinc air batteries, supercapacitors), and for processes of short-cycle adsorption gas separation...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228006/ultra-thin-pyrocarbon-films-as-a-versatile-coating-material
#3
Tommi Kaplas, Polina Kuzhir
The properties and synthesis procedures of the nanometrically thin pyrolyzed photoresist films (PPF) and the pyrolytic carbon films (PCF) were compared, and a number of similarities were found. Closer examination showed that the optical properties of these films are almost identical; however, the DC resistance of PPF is about three times higher than that of PCF. Moreover, we observed that the wettability of amorphous PPF and PCF was almost comparable to crystalline graphite. Potential applications executed by utilizing the small difference in the synthesis procedure of these two materials are suggested...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228005/strained-germanium-quantum-well-pmosfets-on-soi-with-mobility-enhancement-by-external-uniaxial-stress
#4
Yan Liu, Jiebin Niu, Hongjuan Wang, Genquan Han, Chunfu Zhang, Qian Feng, Jincheng Zhang, Yue Hao
Well-behaved Ge quantum well (QW) p-channel metal-oxide-semiconductor field-effect transistors (pMOSFETs) were fabricated on silicon-on-insulator (SOI) substrate. By optimizing the growth conditions, ultrathin fully strained Ge film was directly epitaxially grown on SOI at about 450 °C using ultra-high vacuum chemical vapor deposition. In situ Si2H6 passivation of Ge was utilized to form a high-quality SiO2/Si interfacial layer between the high-κ dielectric and channels. Strained Ge QW pMOSFETs achieve the significantly improved effective hole mobility μ eff as compared with the relaxed Si and Ge control devices...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228004/self-rectifying-resistive-switching-memory-with-ultralow-switching-current-in-pt-ta2o5-hfo2-x-hf-stack
#5
Haili Ma, Jie Feng, Hangbing Lv, Tian Gao, Xiaoxin Xu, Qing Luo, Tiancheng Gong, Peng Yuan
In this study, we present a bilayer resistive switching memory device with Pt/Ta2O5/HfO2-x /Hf structure, which shows sub-1 μA ultralow operating current, median switching voltage, adequate ON/OFF ratio, and simultaneously containing excellent self-rectifying characteristics. The control sample with single HfO2-x structure shows bidirectional memory switching properties with symmetrical I-V curve in low resistance state. After introducing a 28-nm-thick Ta2O5 layer on HfO2-x layer, self-rectifying phenomena appeared, with a maximum self-rectifying ratio (RR) of ~4 × 10(3) observed at ±0...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228003/electrochemical-formation-of-multilayer-sno2-sb-x-o-y-coating-in-complex-electrolyte
#6
Antonina Maizelis, Boris Bairachniy
The multilayer antimony-doped tin dioxide coating was obtained by cathodic deposition of multilayer metal-hydroxide coating with near 100-nm thickness layers on the alloy underlayer accompanied by the anodic oxidation of this coating. The potential regions of deposition of tin, antimony, tin-antimony alloy, and mixture of this metals and their hydroxides in the pyrophosphate-tartrate electrolyte were revealed by the cyclic voltammetric method. The possibility of oxidation of cathodic deposit consisting of tin and Sn(II) hydroxide compounds to the hydrated tin dioxide in the same electrolyte was demonstrated...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228002/custom-shaped-organic-photovoltaic-modules-freedom-of-design-by-printing
#7
M Välimäki, E Jansson, P Korhonen, A Peltoniemi, S Rousu
Freedom of design that was introduced as organic photovoltaic (OPV) modules were fabricated by printing. As proof-of-concept, we show OPV leaf fabrication in A5 size using gravure and rotary screen printing processes for the main active layers of the OPV structure. These printing methods allow direct printing of any kind of arbitrary, two-dimensional shapes including patterning of the electric contacts thus post-patterning stages are not needed. Fabrication of custom-shaped OPV modules requires detailed information about the technical boundaries set by the manufacturing process and materials which in turn influence the layout design and R2R upscaling...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228001/fabrication-of-progesterone-loaded-nanofibers-for-the-drug-delivery-applications-in-bovine
#8
Chitra Karuppannan, Mehnath Sivaraj, J Ganesh Kumar, Rangasamy Seerangan, S Balasubramanian, Dhinakar Raj Gopal
Progesterone is a potent drug for synchronization of the estrus and ovulation cycles in bovine. At present, the estrus cycle of bovine is controlled by the insertion of progesterone-embedded silicone bands. The disadvantage of nondegradable polymer inserts is to require for disposal of these bands after their use. The study currently focuses on preparation of biodegradable progesterone-incorporated nanofiber for estrus synchronization. Three different concentrations (1.2, 1.9, and 2.5 g) of progesterone-impregnated nanofibers were fabricated using electrospinning...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28228000/c60-fullerene-as-promising-therapeutic-agent-for-the-prevention-and-correction-of-skeletal-muscle-functioning-at-ischemic-injury
#9
D M Nozdrenko, D O Zavodovskyi, T Yu Matvienko, S Yu Zay, K I Bogutska, Yu I Prylutskyy, U Ritter, P Scharff
The therapeutic effect of pristine C60 fullerene aqueous colloid solution (C60FAS) on the functioning of the rat soleus muscle at ischemic injury depending on the time of the general pathogenesis of muscular system and method of administration C60FAS in vivo was investigated. It was found that intravenous administration of C60FAS is the optimal for correction of speed macroparameters of contraction for ischemic muscle damage. At the same time, intramuscular administration of C60FAS shows pronounced protective effect in movements associated with the generation of maximum force responses or prolonged contractions, which increase the muscle fatigue level...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209035/electrospun-perovskite-nanofibers
#10
Dongsheng Chen, Yanyan Zhu
CH3NH3PbI3 perovskite nanofibers were synthesized by versatile electrospinning techniques. The synthetic CH3NH3PbI3 nanofibers were characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and photoluminescence. As counter electrodes, the synthesized nanofibers increased the performance of the dye-sensitized solar cells from 1.58 to 2.09%. This improvement was attributed to the enhanced smoothness and efficiency of the electron transport path. Thus, CH3NH3PbI3 perovskites nanofibers are potential alternative to platinum counter electrodes in dye-sensitized solar cells...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209034/production-of-conductive-pedot-coated-pva-go-composite-nanofibers
#11
Nur Afifah Zubair, Norizah Abdul Rahman, Hong Ngee Lim, Yusran Sulaiman
Electrically conductive nanofiber is well known as an excellent nanostructured material for its outstanding performances. In this work, poly(3,4-ethylenedioxythiophene) (PEDOT)-coated polyvinyl alcohol-graphene oxide (PVA-GO)-conducting nanofibers were fabricated via a combined method using electrospinning and electropolymerization techniques. During electrospinning, the concentration of PVA-GO solution and the applied voltage were deliberately altered in order to determine the optimized electrospinning conditions...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209033/in-vitro-investigation-of-bioactive-glass-ceramic-composites-based-on-biogenic-hydroxyapatite-or-synthetic-calcium-phosphates
#12
Nataliia Pinchuk, Oleksandr Parkhomey, Olena Sych
This in vitro investigation of the behavior of two types of calcium phosphate glass ceramics on the basis of phosphates of biogenic or synthetic origin prepared from initial mixtures with different particle size has revealed that some different factors affect the behavior, namely the phase composition of composite, fraction of open porosity, and average diameter of pore channels. It was established that the solubility of the composites on the basis of synthetic calcium phosphates and glass after 2 and 7 days contact with saline composites is the highest among the materials under study...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209032/surface-plasmon-resonance-investigations-of-bioselective-element-based-on-the-recombinant-protein-a-for-immunoglobulin-detection
#13
A Bakhmachuk, O Gorbatiuk, A Rachkov, B Dons'koi, R Khristosenko, I Ushenin, V Peshkova, A Soldatkin
The developed surface plasmon resonance (SPR) biosensor based on the recombinant Staphylococcal protein A with an additional cysteine residue (SPA-Cys) used as a biorecognition component showed a good selectivity and sensitivity for the immunoglobulin detection. The developed biosensor with SPA-Cys-based bioselective element can also be used as a first step of immunosensor creation. The successful immobilization of SPA-Cys on the nanolayer gold sensor surface of the SPR spectrometer was performed. The efficiency of blocking nonspecific sorption sites on the sensor surface with milk proteins, gelatin, BSA, and HSA was studied, and a rather high efficiency of using gelatin was confirmed...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209031/carbon-nanomaterial-formation-on-fresh-reduced-iron-by-converted-natural-gas
#14
A Nebesnyi, V Kotov, A Sviatenko, D Filonenko, A Khovavko, B Bondarenko
The mechanism of carbon nanomaterial formation at moderate temperatures while processing fresh-reduced iron by products of air conversion of natural gas is considered. It is shown that under given conditions, the size and the shape of the resulting carbon are dependent on the temperature and the size of microscopic iron grains formed during reduction. These iron grains are the catalyzer of the reaction of carbon monoxide disproportionation. It is concluded that the formation of a nucleus of the new carbon phase occurs at the contact boundaries of neighboring grains of newly reduced iron with the subsequent formation in these places of ring-shaped carbon cuffs...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209030/effects-of-annealing-ambient-on-the-characteristics-of-laalo3-films-grown-by-atomic-layer-deposition
#15
Lu Zhao, Hong-Xia Liu, Xing Wang, Chen-Xi Fei, Xing-Yao Feng, Yong-Te Wang
We investigated the effects of different annealing ambients on the physical and electrical properties of LaAlO3 films grown by atomic layer deposition. Post-grown rapid thermal annealing (RTA) was carried out at 600 °C for 1 min in vacuum, N2, and O2, respectively. It was found that the chemical bonding states at the interfacial layers (ILs) between LaAlO3 films and Si substrate were affected by the different annealing ambients. The formation of IL was enhanced during the RTA process, resulting in the decrease of accumulation capacitance, especially in O2 ambient...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209029/synthesis-and-electrochemical-property-of-limn2o4-porous-hollow-nanofiber-as-cathode-for-lithium-ion-batteries
#16
Lianfeng Duan, Xueyu Zhang, Kaiqiang Yue, Yue Wu, Jian Zhuang, Wei Lü
The LiMn2O4 hollow nanofibers with a porous structure have been synthesized by modified electrospinning techniques and subsequent thermal treatment. The precursors were electrospun directly onto the fluorine-doped tin oxide (FTO) glass. The heating rate and FTO as substrate play key roles on preparing porous hollow nanofiber. As cathode materials for lithium-ion batteries (LIBs), LiMn2O4 hollow nanofibers showed the high specific capacity of 125.9 mAh/g at 0.1 C and a stable cycling performance, 105.2 mAh/g after 400 cycles...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209028/structure-and-thermal-stability-of-co-and-fe-intercalated-double-silicene-layers
#17
O V Mykhailenko, Yu I Prylutskyy, I V Кomarov, A V Strungar
The arrangement of Fe and Co atoms between two silicene planes was theoretically investigated. The research has shown that below 500 K Co atoms form stable lattices-"hexagonal" (with the lattice parameters 0.635 nm of AB configuration) and cubic (with the lattice parameter of 0.244 nm), whereas Fe atoms form cubic lattices only (with the lattice parameter of 0.281 nm). The system intercalated with Co atoms is stable enough at high temperatures up to ~625 K, while the Fe-silicene system is stable only at ~770 K...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209027/silicon-nanostructures-produced-by-modified-macetch-method-for-antireflective-si-surface
#18
Stepan Nichkalo, Anatoly Druzhinin, Anatoliy Evtukh, Oleg Bratus', Olga Steblova
This work pertains to the method for modification of silicon (Si) wafer morphology by metal-assisted chemical etching (MacEtch) technique suitable for fabrication of antireflective Si surfaces. For this purpose, we made different Au catalyst patterns on the surface of Si substrate. This modification allowed to obtain the close-packed Au nanodrop (ND) pattern that generates the nanowires (NWs) and the well-separated Au NDs, which induce the nanopore (NP) formation. The antireflective properties of these structures in comparison with NWs produced by the conventional Ag-MacEtch method were analysed...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209026/on-demand-fabrication-of-si-sio2-nanowire-arrays-by-nanosphere-lithography-and-subsequent-thermal-oxidation
#19
Huaxiang Cao, Xinhua Li, Bukang Zhou, Tao Chen, Tongfei Shi, Jianqiang Zheng, Guangqiang Liu, Yuqi Wang
We demonstrate the fabrication of the large-area arrays of vertically aligned Si/SiO2 nanowires with full tunability of the geometry of the single nanowires by the metal-assisted chemical etching technique and the following thermal oxidation process. To fabricate the geometry controllable Si/SiO2 nanowire (NW) arrays, two critical issues relating with the size control of polystyrene reduction and oxide thickness evolution are investigated. Through analyzing the morphology evolutions of polystyrene particles, we give a quantitative description on the diameter variations of polystyrene particles with the etching time of plasma etching...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209025/cmos-compatible-fabrication-for-photonic-crystal-based-nanofluidic-structure
#20
Wang Peng, Youping Chen, Wu Ai, Dailin Zhang, Han Song, Hui Xiong, Pengcheng Huang
Photonic crystal (PC)-based devices have been widely used since 1990s, while PC has just stepped into the research area of nanofluidic. In this paper, photonic crystal had been used as a complementary metal oxide semiconductors (CMOS) compatible part to create a nanofluidic structure. A nanofluidic structure prototype had been fabricated with CMOS-compatible techniques. The nanofluidic channels were sealed by direct bonding polydimethylsiloxane (PDMS) and the periodic gratings on photonic crystal structure...
December 2017: Nanoscale Research Letters
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