نتایج جستجو برای: sio2 nanoparticle

تعداد نتایج: 44420  

2017
Lanzhong Hao Yunjie Liu Yongjun Du Zhaoyang Chen Zhide Han Zhijie Xu Jun Zhu

A novel few-layer MoS2/SiO2/Si heterojunction is fabricated via DC magnetron sputtering technique, and Pd nanoparticles are further synthesized on the device surface. The results demonstrate that the fabricated sensor exhibits highly enhanced responses to H2 at room temperature due to the decoration of Pd nanoparticles. For example, the Pd-decorated MoS2/SiO2/Si heterojunction shows an excellen...

2015
Daifang Wang Longhua Guo Rong Huang Bin Qiu Zhenyu Lin Guonan Chen

Surface enhanced spectroscopy such as surface enhanced Raman spectrum (SERS) and surface enhanced fluorescence have been investigated extensively in the past two decades. Herein, we present experimental evidence to demonstrate the existence of a new surface enhanced spectroscopy, namely, surface enhanced electrochemiluminescence (SEECL). Our investigation indicates that the electrochemiluminesc...

Journal: :The journal of physical chemistry. B 2006
Tsukasa Torimoto Shin-ya Murakami Miwa Sakuraoka Kentaro Iwasaki Ken-ichi Okazaki Tamaki Shibayama Bunsho Ohtani

Size-selective photoetching was applied to silica-coated cadmium selenide (SiO2/CdSe) nanoparticles to precisely control their photoluminescence properties. The absorption spectra of CdSe was blue-shifted by irradiation of monochromatic light, and finally, the absorption onset agreed with the wavelength of irradiation light, indicating that CdSe particles were photoetched to smaller ones until ...

2016
Patrick A Reissner Jean-Nicolas Tisserant Antoni Sánchez-Ferrer Raffaele Mezzenga Andreas Stemmer

Gold nanoparticle monolayers provide convenient templates to study charge transport in organic molecules beyond single junction techniques. Conductance is reported to increase by several orders of magnitude following immersion of alkanethiol-stabilized gold nanoparticle monolayers in a solution containing conjugated thiol-functionalized molecules. Typically, this observation is attributed to mo...

2015
Nicolas L Dmitruk Olga Yu Borkovskaya Iryna B Mamontova Sergii V Mamykin Sergii Z Malynych Volodymyr R Romanyuk

The photocurrent enhancement effect caused by Au and Ag nanoparticles for GaAs-based photovoltaic structures of surface barrier or p-n junction type with microtextured interfaces has been investigated in dependence on the conditions of nanoparticles deposition and, respectively, on the shape and local dielectric environment of obtained nanoparticle arrays. Three nanoparticle deposition methods ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Epsita Kar Navonil Bose Sukhen Das Nillohit Mukherjee Sampad Mukherjee

Poly(vinylidene fluoride) (PVDF) nanocomposites are recently gaining importance due to their unique dielectric and electroactive responses. In this study, GeO2 nanoparticles/PVDF and SiO2 nanoparticles/PVDF nanocomposite films were prepared by a simple solution casting technique. The surface morphology and structural properties of the as-prepared films were studied by X-ray diffraction, scannin...

2016
Xueqin Zhao Ting Shang Xiaodan Zhang Ting Ye Dajin Wang Lei Rei

Delivery of diagnostic or therapeutic agents across the blood-brain barrier (BBB) remains a major challenge of brain disease treatment. Magnetic nanoparticles are actively being developed as drug carriers due to magnetic targeting and subsequently reduced off-target effects. In this paper, we developed a magnetic SiO2@Fe3O4 nanoparticle-based carrier bound to cell-penetrating peptide Tat (SiO2@...

2017
Bin Shen Yilin Gao Qingyun Liu Shengming Cheng Wei Feng

In this article, a facile strategy is developed to synthesize a nanocomposite containing both a rare earth doped upconversion nanoparticle (RE-UCNP) and gold nanoparticles (GNPs). Such a nanocomposite can serve as a dual-modal imaging agent for upconversion luminescence (UCL) imaging and photoacoustic tomography (PAT). High spatial resolution, 3-dimensional imaging of blood vessels could be ach...

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