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Results 101 - 150 of 1397
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Liu Minmin - - 2013
Sensitive and selective detection of 2,4,6-trinitrotoluene (TNT) has attracted considerable attention due to the wide applications of TNT as explosive material. Many efforts have been made to develop various sensors for detecting TNT in recent years. We herein report a novel sensor based on p-aminothiophenol (PATP) functionalized silver nanoparticles supported ...
Luo Guoqiang - - 2013
Graphene/reduced graphene oxide (rGO) modification has been demonstrated to be an efficient route to improve the photocatalytic performance of various photocatalysts by promoting the effective separation of photogenerated electrons and holes. It is highly required to develop facile and environment-friendly methods for the preparation of graphene-based photocatalytic materials. In this ...
Chen Jian - - 2013
A novel architecture of graphene paper is proposed to consist of "1D metallic nanowires/defect-free graphene sheets". Highly conductive and flexible papers of 1D silver nanowires (Ag NWs) and chemical vapor deposition (CVD) graphene sheets as an example were fabricated by a simple filtration method. CVD graphene paper possesses much higher ...
Faber Gert S - - 2013
Trunk inclination (TI) is often used as a measure to quantify back loading in ergonomic workplace evaluation. The goal of the present study was to determine the effects of lifting style and participant's sex on the optimal inertial sensor (IS) location on the back of the trunk for the measurement ...
Wang Yan - - 2013
Anodic TiO2 nanotube arrays have attracted extensive interests in the past decade, especially for monitoring or sensing of the gas. In this paper, an ameliorated two-step anodization process was adopted for the preparation of highly ordered and vertically aligned TiO2 nanotube arrays on the Ti metal substrate. The as-prepared TiO2 ...
Wu Chaoxing - - 2013
Resistive switching memory devices based on three-dimensionally confined Ag quantum dots (QDs) embedded in polyimide (PI) layers were fabricated by using spin-coating and thermal evaporation. The Ag QDs embedded in PI layer were distributed uniformly with sizes of approximately 4-6 nm and with surface density of approximately 1.25 x 10(11) ...
Liu Jianbo - - 2013
A feasible way is developed to prepare Au core/Au-Ag alloy shell nanorods (Au@Au(x)Ag(1-x) NRs) based on co-reduction of gold and silver ions under the guidance of Au NRs templates. Alloy nanorods with a wide composition range (x tunable from 0 to 1) are obtained. The Ag+/Au3+ ratios are found to ...
Manivannan Shanmugam - - 2013
Different synthetic routes were described to prepare silver (Ag) nanoparticles (NPs) embedded in an amine functionalized silicate sol-gel matrix (TPDT) by employing different combination of reagents such as silicate sol-gel (TPDT), β-cyclodextrin (CD)-TPDT, TPDT-surfactant (BDAC), CD-TPDT-BDAC and CD-TPDT-BDAC/ascorbic acid (AA). The spectral and colorimetric detection of Hg(ii) ions were carried ...
Calle-Vallejo Federico - - 2013
The current imbalance in the biogeochemical cycle of nitrogen is as serious as that of carbon. One way to mitigate this problem is through the electrochemical reduction of nitrates under mild conditions, which is an appealing though not fully understood process. Therefore, deeper insight into the electrocatalytic reaction mechanism is ...
Ibrahim N A - - 2013
This study was devoted to enhancing the antibacterial functionality of pigment printed cotton, linen and viscose fabrics. Ag-NP's/PVP colloid, triclosan derivatives, chitosan or choline chloride was successfully incorporated into the pigment paste followed by printing and microwave curing to impart antibacterial activity to the cellulosic prints. Results obtained demonstrate that ...
Hirai Masahiro - - 2013
Event-related potentials were measured in twenty-four children aged 6-15 years, at one-year intervals for two years, to investigate developmental changes in each subject's neural response to a point-light walker (PLW) and a scrambled PLW (sPLW) stimulus. One positive peak (P1) and two negative peaks (N1 and N2) were observed in ...
Wu Dajian - - 2013
A three-layered Ag-low-permittivity (LP)-high-permittivity (HP) nanoshell is proposed as a plausible meta-atom for building the three-dimensional isotropic negative refractive index metamaterials (NIMs). The overlap between the electric and magnetic responses of Ag-LP-HP nanoshell can be realized by designing the geometry of the particle, which can lead to the negative electric ...
Wang Y - - 2013
Broadband antireflection of silicon has been realized by combining black silicon, surface passivation and surface plasmons. Black silicon, fabricated by Ag assisted chemical etching, was employed here to reduce the reflection of incident light with wavelengths below 1100 nm. Due to the increased bandgap caused by the quantum confinement effect ...
Wang Ruey-Chi - - 2013
Well-controlled growth of Ag nanoparticles (NPs) on Si substrates is important for next generation Si-based optoelectronic devices, but only randomly oriented Ag NPs have been previously reported. In this work, well-oriented Ag NPs with regular shapes are pseudomorphically grown on Si(100) and Si(111) substrates with crystallographic relationships of {100}⟨010⟩Ag ∥ {100}⟨010⟩Si and ...
Jeon Tae Yoon - - 2013
Large-area, highly ordered, Ag nanostructured arrays with various geometrical features were prepared for use as surface-enhanced Raman scattering (SERS)-active substrates by the self-assembly of inorganic particles on an SU-8 surface, followed by particle embedding and Ag vapor deposition. By adjusting the embedding time of the inorganic particles, the size of ...
Gao Rungang - - 2013
In this paper, we have reported that paper-like graphene-Ag composite films could be prepared by a facile and novel chemical reduction method at a large scale. Using ascorbic acid as a reducing agent, graphene oxide films dipped in Ag+ aqueous solutions can be easily reduced along with the decoration of ...
Cho Deok-Yong - - 2013
AgI nanoionics-based resistive switching memories were studied in respect to chemical stability of the Ag/AgI interface using x-ray absorption spectroscopy. The apparent dissolution of Ag films of thickness below some tens of nanometers and the loss of electrode/electrolyte contact was critically addressed. The results evidently show that there are no ...
Park Sun Hwa - - 2013
We have synthesized micrometer-sized Ag nanosheets via a facile, one-step, template-free electrochemical deposition in an ultra-dilute silver nitrate aqueous electrolyte. The nanosheet growth was revealed to occur in three stages: (1) formation of polygonal Ag nuclei on a substrate, (2) growth of {112}-faceted nanowire from the nuclei, and (3) anisotropic ...
Thaler-Kall Kathrin - - 2013
13 volunteers walked on a treadmill at 6 different speeds while wearing different accelerometers on different body positions, a spirometry unit and heart rate devices. The goal of this experiment was to find which position on a person's body and which of the sensors is best to measure physical activity ...
Weiss Aner - - 2013
The identification and documentation of subclinical gait impairments in older adults may facilitate the appropriate use of interventions for preventing or delaying mobility disability. We tested whether measures derived from a single body-fixed sensor worn during traditional Timed Up and Go (TUG) testing could identify subclinical gait impairments in community ...
Dwivedi Nidhi - - 2013
The study aims to develop latent lip prints on glass surface using fingerprint black powder and its comparison with standard lipstick prints and also determines the effectiveness of the technique. This study included a total of 100 subjects, comprising of 50 males and 50 females with age ranging from 17 ...
Lan Ming-Ying - - 2013
In this study, Ag is electron-beam evaporated to modify the topography of anodic TiO2 nanotubes of different diameters to obtain an implant with enhanced antibacterial activity and biocompatibility. We found that highly hydrophilic as-grown TiO2 nanotubes became poorly hydrophilic with Ag incorporation; however they could effectively recover their wettability to ...
Nguyen Vinh Quang - - 2013
We previously reported a simple method for the preparation of size-controlled spherical silver nanoparticles (Ag NPs) generated by autoclaving a mixture of silver-containing glass powder and glucose. The particle size is regulated by the glucose concentration, with concentrations of 0.25, 1.0 and 4.0 wt% glucose providing small (3.48±1.83 nm in ...
Sun Zhaoqi Z School of Physics & Materials Science, Anhui University, Hefei 230601, People's Republic of China. - - 2013
Transflective and highly conductive Ag/ITO/Ag multilayer films were prepared by magnetron sputtering on glass substrates. The microstructure and optical properties of Ag/ITO/Ag multilayer films were systematically investigated by X-ray diffraction, scanning electron microscopy, and ultraviolet-visible spectroscopy. The optical properties of the multilayer films were significantly influenced by the thickness of ...
Karasik Rona J - - 2012
Good teaching requires thoughtful planning and creative thinking, especially when trying to engage students in material that is unfamiliar to them or encumbered by stereotypes, like aging. Classic and contemporary media can provide unique teaching opportunities in gerontology classrooms. Popular films can have a powerful influence over viewers' attitudes and ...
Jiao Zhengbo - - 2012
Herein, we demonstrate for the first time the fabrication of concave trisoctahedral Ag(3)PO(4) microcrystals enclosed by {221} and {332} facets based on the heteroepitaxial growth procedure, which exhibit much higher photocatalytic activities than cubic Ag(3)PO(4) and commercial N-doped TiO(2).
Bagala F - - 2012
Sufficient capacity and quality of performance of complex movement patterns during daily activity, such as standing up from a bed, is a prerequisite for independent living and also may be an indicator of fall risk. Up to now, the transfer from lying-to-sit-to-stand-to-walk (LSSW) was investigated by functional testing, subjective rating ...
Yuan Ya-Xian - - 2012
The corrosion inhibition behavior of benzotriazole (BTAH) on Ag electrodes and the influence of triphenylphosphane (pph(3)) were investigated by electrochemical method, in situ surface-enhanced Raman spectroscopy (SERS) and direct electrochemical synthesis of surface complexes in nonaqueous solution. The results indicated that the BTA(-) ion was coordinated to the Ag surface ...
Seo Sohyeon - - 2012
The electrodeposition of Ag into organized surfactant templates adsorbed onto (22 × √3) reconstructed Au(111) is investigated by in situ electrochemical scanning tunneling microscopy. Ag(+) concentrations of as low as 2.5 × 10(-6) M allow the visualization of the electrochemical molecular templating effect of a sodium dodecyl sulfate (SDS) adlayer. ...
Thuvander Mattias - - 2012
Lath boundaries in a maraging stainless steel of composition 13Cr-8Ni-2Mo-2Cu-1Ti-0.7Al-0.3Mn-0.2Si-0.03C (at%) have been investigated using atom probe tomography following aging at 475°C for up to 100h. Segregation of Mo, Si and P to the lath boundaries was observed already after 5min of aging, and the amount of segregation increases with ...
Nam Sun-Hwa - - 2012
Gold nanoparticles (Au NPs), silver nanoparticles (Ag NPs), zinc oxide nanoparticles (ZnO NPs) and titanium dioxide nanoparticles (TiO(2) NPs) are widely used in cosmetic products such as preservatives, colorants and sunscreens. This study investigated the genotoxicity of Au NPs, Ag NPs, ZnO NPs and TiO(2) NPs using the SOS chromotest ...
Guo Tao - - 2012
In this work, one dimensional (1D) Ag-Au solid solution nanoalloys were synthesized by rapidly diffusing Ag into the preformed Au nanorod (AuNR) seeds at ambient temperature in aqueous solution. By varying the molar ratio of AgCl/AuNR (in gold atoms), two kinds of 1D Ag-Au alloy nanostructures with a narrow size ...
Gao Yuanpeng - - 2012
Layered protonated titanate nanosheets (LPTNs) loaded with silver nanoparticles are prepared by a simple one-pot hydrothermal route in silver-ammonia solution. The as-synthesized Ag-loaded LPTNs possess large specific surface area. The Ag nanoparticles are highly dispersed on the surface of the LPTNs. They have negligible effects on the crystal structure, crystallinity, ...
Rahmani Safa - - 2012
Diffuse electrical currents delivered to the eye were investigated in a rat model of retinitis pigmentosa for potentially therapeutic effects. Low-level currents were passed between electrodes placed on the cornea and in the mouth during 30-minute sessions two times per week from 4-16 weeks of age. Single-flash electroretinograms (ERG) were ...
Gondal Mohammed Ashraf - - 2012
The work presented here deals with the photoreduction in metallic silver nanoparticles onto the surface of Ag(3)PO(4) and resulting photocatalytic activity enhancement toward degradation of dye molecules, namely Rhodamine B (Rh. B) as a model compound, from aqueous solution under UV or visible light irradiation. Our results clearly indicated that ...
Boomi Pandi - - 2012
Polyaniline, polyaniline/Ag-Pt nanocomposite and bimetal (Ag-Pt) colloidal solution were chemically synthesized and characterized by UV-vis, XRD, FT-IR, TGA, HRSEM with EDAX and HRTEM techniques. The results reveal that there was a strong interaction between Ag-Pt nanocomposite and polyaniline chains. This interaction makes only small changes in the backbone chain of ...
Naranjo-Hernández David - - 2012
This paper presents the hardware and software design and implementation of a low-cost, wearable, and unobstructive intelligent accelerometer sensor for the monitoring of human physical activities. In order to promote healthy lifestyles to elders for an active, independent, and healthy ageing, as well as for the early detection of psychomotor ...
Mai Fu-Der - - 2012
As is shown in the literature, surface-enhanced Raman scattering (SERS)-active Ag films obtained by the salting-out of Ag colloids from solutions with some salts, are popularly used to examine the structure of analytes. SERS-active Ag nanoparticles (NPs) demonstrate more significant SERS effects than Au NPs, however, problems regarding the stabilities ...
Gutes Albert - - 2012
Nanostructured silver is known to yield the highest signal enhancement factors in surface-enhanced Raman spectroscopy, but its low chemical stability towards oxidation presents a challenge in the realization of Ag-based SERS substrates with long operating lifetime. Here, a study of the long-term stability of silver dendrites as SERS substrates is ...
Zhang Mingyi - - 2012
Carbon-modified BiVO(4) microtubes embedded with Ag nanoparticles (BVO@C/Ag MTs) were obtained by a two-step fabrication route. First, the BiVO(4)@carbon core-shell microtubes (BVO@C MTs) were fabricated by using BiVO(4) microtubes (BiVO(4) MTs) as a hard-template through a hydrothermal approach. Next, small Ag nanoparticles (Ag NPs) with well-dispersed distribution were assembled inside ...
Yan Zijie - - 2012
Pulsed laser ablation in liquid (PLAL) has been well established as a facile method to produce nanoparticles from bulk materials, but it is still insufficient for fabricating anisotropic and complex nanostructures, especially without the use of surfactants. Here, we demonstrate that silver (Ag) nanosheets can be produced by pulsed excimer ...
Tassinari Francesco - - 2012
Abstract GC/OligoThiophene/Ag(NP) hybrid interfaces are synthesized and characterized: GC is the glassy carbon surface, OligoThiophene stands for a bithiophene moiety (or 4-Br-Bithiophene grafted interlinked polymer), Ag(NP) stands for silver nanoparticles. The hybrid interface preparation is a three steps procedure: first the electrode surface is functionalized through the combination of electrochemical ...
Ren Rui - - 2012
This Letter presents a crystalline silicon thin film solar cell model with Si nanowire arrays surface decoration and metallic nanostructure patterns on the back reflector. The nanostructured Ag back reflector can significantly enhance the absorption in the near-infrared spectrum. Furthermore, by inserting a ZnO:Al layer between the silicon substrate and ...
Chen Zhimin - - 2012
A steric hindrance colloidal microspheres approach (SHCMA) has been developed for the fabrication of ordered Pt or Pt/Ag nanoparticles composite interconnected hollow hemispheres via colloidal lithography and physical vapor deposition. Monolayer ordered silica or silica/Ag nanoparticles composite microspheres partly embedded into the polydimethylsiloxane (PDMS) were used as template, and Pt ...
Guske Joshua T - - 2012
Near-infrared surface plasmon resonance (SPR) spectra were collected of thin multilayer films of aluminum-doped zinc oxide (AZO) / silver (Ag) / AZO on BK-7 glass in the Kretschmann configuration in air, with the silver layer thickness varying from 5 nm to 50 nm. The SPR results were interpreted by modeling ...
Dong Wenjun - - 2012
A simple chemical solution route for the synthesis of large-scale high-quality Ag nanoparticle functionalized molybdenum oxide nanowire at room temperature has been developed. In the synthesis, the protonated amine was intercalated into the molybdenum bronze layers to reduce the electrostatic force of the lamellar structures, and then the Ag nanoparticle ...
Ahmad R - - 2012
This paper addresses the growth of nano-structured MgZnO thin films by sol-gel spin coating method which will be used as a template layer to grow carbon nanotubes. The nano-structured MgZnO films were deposited on platinized (100) silicon substrates. In this work, we focused on the effect of aging and Mg ...
Yoo Sang-Hoon - - 2012
Here we demonstrate that, in the dealloying process of Au-Ag nanorods, temperature is the key parameter for producing porous Au nanorods with tunable ligament sizes. The vertically aligned Au-Ag alloy nanorods were first synthesized by the electrochemical co-deposition of Au and Ag onto anodic aluminum oxide (AAO) membrane templates. Porous ...
Suh Youngjoon - - 2012
It was found that the Ag electrode layer in a TEM specimen of an inverted polymer solar cell structure of Ag/PEDOT:PSS/P3HT:PCBM/TiO2/ITO/glass was broken down into particles as time passed. In order to investigate the cause of Ag particle formation and the effect of the degradation on the performance of solar ...
Dong Haifeng - - 2012
A simple, sensitive and label-free method for microRNA (miRNA) biosensing was described using oligonucleotide encapsulated silver nanoclusters (Ag-NCs) as effective electrochemical probe. The functional oligonucleotide probe integrates both recognition sequence for hybridization and template sequence for in situ synthesis of Ag-NCs, which appears to possess exceptional metal mimic enzyme property ...
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