ZnO nanowire photodetectors with and without Au nanoparticles have been fabricated investigated. The dark current decreases by 2 orders of magnitude the ratio photo to increases after covering nanoparticles. Meanwhile, decorated can drastically improve response speed photodetectors. A physical model based on band energy theory was developed illustrate origin improvement performance for photodetector attached Au. Our work suggests that rational integration wire metal is a viable approach...

Circumferential magnetic patterned media were prepared on a 2.5-inch-diameter glass plate and 3-in-diameter silicon plate. A Ni master disk possessing spiral patterns with 60-250-nm-width lands 400-nm-width groove was pressed into resist film CoPt or CoCrPt to transfer the patterns. diblock copolymer solution cast obtained grooves then annealed prepare self-assembling dot structures aligned along grooves. According patterns, underlying films by ion milling yield 40-nm diameter. Coercive...

Owing to the special properties and wide applications, UV photodetectors based on wide‐band‐gap semiconductors have drawn an increasing interest during last two decades. However, practical are required contradictory performances: high internal gain fast recovery speed, because is achieved by long life time of photoexcited carriers needs their decay. Their slow decay in has been known as a persistent photoconductivity (PPC) problem hinders applications. In this paper, good solution above...

Background —Restenosis after percutaneous transluminal coronary (balloon) angioplasty (PTCA) remains a major drawback of the procedure. We previously reported that cilostazol, platelet aggregation inhibitor, inhibited intimal proliferation directional atherectomy and reduced restenosis rate in humans. The present study aimed to determine effect cilostazol on PTCA. Methods Results —Two hundred eleven patients with 273 lesions who underwent successful PTCA were randomly assigned (200 mg/d)...

Fabrication of protein–inorganic hybrid materials innumerable hierarchical patterns plays a major role in the development multifunctional advanced with their improved features synergistic way. However, effective fabrication and applications structures is limited due to difficulty control production cost. Here, we report controlled complex flowers porosity through green facile coprecipitation method by using industrial waste natural silk protein sericin. The large surface areas microsize...

We report STM-induced desorption of H from $\mathrm{Si}\left(100\right)\ensuremath{-}\mathrm{H}\left(2\ifmmode\times\else\texttimes\fi{}1\right)$ at negative sample bias. The rate exhibits a power-law dependence on current and maximum $\ensuremath{-}7\mathrm{V}$. is explained by vibrational heating due to inelastic scattering tunneling holes with the Si-H $5\ensuremath{\sigma}$ hole resonance. bias analyzed using novel approach for calculating scattering, which includes effect electric field...

Facilely fabricated silk protein sericin-mediated hierarchical hydroxyapatite hybrid architectures show excellent adsorption of toxic heavy metal ions Pb(<sc>ii</sc>), Cd(<sc>ii</sc>) and Hg(<sc>ii</sc>) a hazardous dye, Congo red (CR), from wastewater.

A generalization of the double sample holder (DSH) concept is presented for an ultra-high vacuum (UHV) low-temperature (LT) multi-probe scanning tunneling microscope (STM). In UHV, DSH carrying, side-by-side, a reference metal [Au(111) single crystal STM tip apex preparation] and ancillary stand-alone small (for samples originating from clean room) that can be mounted in situ in/out plate. navigation on both surfaces performed using UHV electron positioned above stage. For demonstration,...

Scanning tunneling microscope (STM) induced light emission from artificial atomic scale structures comprising silicon dangling bonds on hydrogen-terminated Si(001) surfaces has been mapped spatially and analyzed spectroscopically in the visible spectral range. The is based a novel mechanism involving optical transitions between tip state localized states sample surface. wavelength of photons can be changed by bias voltage STM. spatial resolution photon maps as good that STM topographic...

The electrical properties of individual ZnO nanowires were investigated for two methods fabricating nanowire-electrode junctions. number carriers in the was increased by electrostatically doping them applying a gate voltage. chemically doped introducing impurities during growth. Ga-doped had linear current-voltage relationship over wide voltage region. junctions formed either using lithography to form electrodes on nanowire or an AFM probe move onto prepared electrodes. With both methods,...

We have constructed a new Electron Beam Ion Trap (EBIT). Over recent months, we operated this device and obtained some experimental results. In paper, show the performance of EBIT by illustrating these

We reported the fabrication of a highly sensitive, fast, and thermally switchable humidity sensor based on β-Ga2O3–amorphous-SnO2 core–shell microribbon, which was synthesized via simple one-step chemical vapour deposition. The as-grown microribbons were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), photoelectron (XPS), diffraction (XRD) results indicated that microribbon has well-defined structure with β-Ga2O3 in core amorphous SnO2 shell....

Silver (Ag) growth on H-terminated Si(001) surfaces with prepatterns of silicon (Si) dangling bonds has been studied at room temperature using a scanning tunneling microscope (STM). The patterns were fabricated by extraction hydrogen (H) atoms from Si(001)-(2\ifmmode\times\else\texttimes\fi{}1) surface STM tip. study covers four different patterns: (1) an isolated single bond site, (2) wire $(\ensuremath{\sim}1$ nm wide), (3) area $(20\ifmmode\times\else\texttimes\fi{}20$...

Recent progress in the development of patterned magnetic recording media is presented, focusing on results fabricated by a self-assembled mask process. Several issues such as fabrication process, flyability, and signal processing have been discussed so far. However, recent seems to resolve these problems. A process using nano-imprint lithography possible solution terms productivity. Good for flyability reported discrete track media. Certain advantages with respect reported. Although problems...

Abstract The humidity sensitivity of a single β‐Ga 2 O 3 /amorphous SnO core/shell microribbon on flexible substrate is enhanced by the application tensile strain and increases linearly with strain. strain‐induced enhancement originates from increase in effective surface area where water molecules are adsorbed. This dependence can be used to monitor external sensing device under various amounts mechanical loading shows excellent reliability reproducibility gauge factor −41. has high...

We report the optical and magnetic properties of ZnO, Zn0.97In0.03O, Zn0.94In0.06O nanowires (NWs). All samples have similar wirelike shape with an average diameter about 70 nm a length 10 μm. The comparison photoluminescence (PL) spectra at K indicated that new broad emission band appeared after indium doping, which is associated donor-acceptor-pair recombination. Additionally, intensity oxygen-vacancies-induced visible increased increasing In content, indicating doping can induce many...

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Etching the damage of a patterned media fabricated with an artificially assisted self-assembled mask is estimated. CoCrPt thin films were etched by ion milling into aligned dots diameter 40 nm. The condition was optimized for reducing etching damage. As result, to crystal lattice and orientation estimated be slight transmission electron microscope (TEM) scanning (SEM) analyses. Though strong perpendicular anisotropy induced patterning process, magnetic measurements Landau-Lifshitz-Gilbert...

A fundamental optical study was performed on superconducting ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{CaCu}}_{2}$${\mathrm{O}}_{8}$ by using a high-accuracy universal polarimeter (HAUP). As this crystal is strongly linearly dichroic, we developed the extended HAUP theory which includes treatments of dichroisms. After having determined nature crystal, applied method to thin (001) plate specimen with light traveling front and rear directions in specimen. These two experiments permitted...

Vibrational excitations of CO2 molecules physisorbed on Ag(111) at 40 K were measured by high-resolution electron energy-loss spectroscopy (EELS). Measurements EELS performed an incident energy 1.5 to 30 eV for exposures ranging from 0.5 5 L. energies three fundamental vibrational modes coincided with the values in gas phase within ±3 meV. Resonance excitation symmetric stretch mode was observed 3 and 9 eV. The (n00) (n10) progressions significant 2 eV, which is related a 3.8-eV resonance...