نتایج جستجو برای: gnr

تعداد نتایج: 321  

Journal: :ACS nano 2011
Christin Grabinski Nicole Schaeublin Andy Wijaya Helen D'Couto Salmaan H Baxamusa Kimberly Hamad-Schifferli Saber M Hussain

Gold nanorods (GNRs) stabilized with cetyltrimethylammonium bromide (CTAB) and GNR functionalized via a ligand exchange method with either thiolated polyethylene glycol (PEG(5000)) or mercaptohexadecanoic acid (MHDA) were investigated for their stability in biological media and subsequent toxicological effects to HaCaT cells. GNR-PEG and GNR-MHDA exhibited minimal effects on cell proliferation,...

By applying tensile local uniaxial strain on 5 nm of drain region and compressive local uniaxial strain on 2.5 nm of source and 2.5 nm of channel regions of graphene nanoribbon tunneling field-effect transistor (GNR-TFET), we propose a new bandgap-engineered (BE) GNR-TFET. Simulation of the suggested device is done based on non-equilibrium Green’s function (NEGF) method by a mode-space approach...

2013
Mikhail Yu Tsvetkov Boris N Khlebtsov Vitaly A Khanadeev Victor N Bagratashvili Peter S Timashev Mikhail I Samoylovich Nikolai G Khlebtsov

We describe a new approach to the fabrication of surface-enhanced Raman scattering (SERS) substrates using gold nanorod (GNR) nanopowders to prepare concentrated GNR sols, followed by their deposition on an opal-like photonic crystal (OPC) film formed on a silicon wafer. For comparative experiments, we also prepared GNR assemblies on plain silicon wafers. GNR-OPC substrates combine the increase...

2009
Mircea R. Stan Dincer Unluer Avik Ghosh Frank Tseng

Graphene has recently emerged as a serious contender for the post Silicon era. Graphene NanoRibbon (GNR) devices have similar performance characteristics as Carbon Nano Tube (CNT) ones. However, lithographic patterning methods applied to graphene avoids the degree of chirality control and alignment issues typical of CNTs. GNR devices and GNR interconnect can be seamlessly obtained by patterning...

2016
Sithara S. Wijeratne Evgeni S. Penev Wei Lu Jingqiang Li Amanda L. Duque Boris I. Yakobson James M. Tour Ching-Hwa Kiang

Graphene nanoribbons (GNR), can be prepared in bulk quantities for large-area applications by reducing the product from the lengthwise oxidative unzipping of multiwalled carbon nanotubes (MWNT). Recently, the biomaterials application of GNR has been explored, for example, in the pore to be used for DNA sequencing. Therefore, understanding the polymer behavior of GNR in solution is essential in ...

Journal: :Journal of biophotonics 2013
Rinat Ankri Amihai Meiri Shemuel I Lau Menachem Motiei Rachela Popovtzer Dror Fixler

Spatial diffusion reflection (DR) measurements of gold nanorods (GNR) were recently suggested as a simple and highly sensitive non-invasive and non-ionizing method for real-time cancer detection. In this paper we demonstrate that wavelength dependent DR measurements enable the spectral red-shift observation of highly concentrated GNR. By conjugating targeting moieties to the GNR, large density ...

2015
Narsireddy Amreddy Ranganayaki Muralidharan Anish Babu Meghna Mehta Elyse V Johnson Yan D Zhao Anupama Munshi Rajagopal Ramesh

BACKGROUND In lung cancer, the efficacy of conventional chemotherapy is limited due to poor drug accumulation in tumors and nonspecific cytotoxicity. Resolving these issues will increase therapeutic efficacy. METHODS GNR-Dox-Tf-NPs (gold nanorod-doxorubicin-transferrin-nanoparticles) were prepared by different chemical approaches. The efficacy of these nanoparticles was carried out by cell vi...

Journal: :Nanoscience and nanotechnology letters 2012
Anton V Liopo André Conjusteau Olga V Chumakova Sergey A Ermilov Richard Su Alexander A Oraevsky

We developed a methodology for high yield synthesis of gold nanorods (GNR) with narrow band optical absorption centered at 760 nm. GNR were purified from hexadecyltrimethylammonium bromide (CTAB) and coated with polyethylene glycol (PEG). The molar ratio between GNR and PEG (1÷50000) was optimized to make the conjugate a biocompatible PEG-GNR contrast agent for optoacoustic (OA) imaging. In vit...

2012
Izabela Korona-Glowniak Ewelina Grywalska Beata Chudzik Agnieszka Bojarska-Junak Anna Malm Jacek Rolinski

The aim of the study was to assess the frequency and predisposing factors of colonization of upper respiratory tract by Gram-negative rods (GNRs) in chronic lymphocytic leukemia (CLL) patients. Antimicrobial susceptibility of the isolated strains was determined. A significantly higher frequency of GNR colonization in CLL patients was observed (36.7%) in comparison to healthy volunteers (8.3%). ...

Journal: :Nanoscale 2015
Mingkai Liu Yifeng Du Yue-E Miao Qianwei Ding Sixin He Weng Weei Tjiu Jisheng Pan Tianxi Liu

Anisotropic electrically conductive films (PI-GNR/CNT) consisting of highly aligned polyimide (PI) composite fibers with graphene nanoribbon (GNR) and carbon nanotube (CNT) (GNR/CNT) hybrids as nanofillers have been prepared by electrospinning. The GNR/CNT hybrids used here were prepared by one-step partial unzipping of multi-walled CNTs, in which, with the residual CNTs bonded on the randomly ...

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