نتایج جستجو برای: swcnts

تعداد نتایج: 1014  

Journal: :Small 2013
Bilu Liu Hua Jiang Arkady V Krasheninnikov Albert G Nasibulin Wencai Ren Chang Liu Esko I Kauppinen Hui-Ming Cheng

Electronic characteristics of a single-walled carbon nanotube (SWCNT) strongly depend on minor variations in its atomic arrangement, specifically chirality. Therefore, precise control over nanotube chirality is highly desired for their application. Theoretically, SWCNTs with different structures have different chemical reactivities, which can be further used for their chirality selection. Here,...

Journal: :Journal of clinical toxicology 2012
Xiaoqing He Shih-Houng Young Joseph E Fernback Qiang Ma

Single-walled carbon nanotubes (SWCNTs) are newly discovered material of crystalline carbon that forms single-carbon layer cylinders with nanometer diameters and varying lengths. Although SWCNTs are potentially suitable for a range of novel applications, their extremely small size, fiber-like shape, large surface area, and unique surface chemistry raise potential hazard to humans, including lun...

2011
Hengguang Yuan Shanglian Hu Peng Huang Hua Song Kan Wang Jing Ruan Rong He Daxiang Cui

Herein we are the first to report that single-walled carbon nanotubes (SWCNTs) exhibit dual-phase regulation to Arabidopsis mesophyll cells exposed to different concentration of SWCNTs. The mesophyll protoplasts were prepared by enzyme digestion, and incubated with 15, 25, 50, 100 μg/ml SWCNTs for 48 h, and then were observed by optical microscopy and transmission electron microscopy, the react...

2012
Mandavi Kumari Sumedha Sachar Rajiv K. Saxena

Interactions between poly-dispersed acid functionalized single walled carbon nanotubes (AF-SWCNTs) and primary lung epithelial (PLE) cells were studied. Peritoneal macrophages (PMs, known phagocytic cells) were used as positive controls in this study. Recovery of live cells from cultures of PLE cells and PMs was significantly reduced in the presence of AF-SWCNTs, in a time and dose dependent ma...

2013
Lu Yan Shu Zhang Chao Zeng Yuhua Xue Zhonglou Zhou Fan Lu Hao Chen Jia Qu Liming Dai Yong Liu

In this paper, we report the first study on cytotoxicity of single-walled carbon nanotubes (SWCNTs) and theirs derivatives with human ocular cells, such as ARPE-19 cells. In particular, we have systematically investigated the cytotoxicity of SWCNTs, hydroxyl-functionalized SWCNTs (SWCNT-OH), and carboxylic functionalized SWCNTs (SWCNT-COOH) with ARPE-19 cells by examining their influence on the...

Journal: :Journal of Nanomaterials 2023

Single-walled carbon nanotubes (SWCNTs) involving polyethylene glycol (PEG) and polyethyleneimine (PEI), which contain amines, were produced analyzed using X-ray diffraction (XRD), UV–vis spectroscopy, Raman spectroscopy (RS), transmission electron microscopy (TEM) for the spectral structural analyses of PEG-PEI-SWCNTs. PEG-PEI-SWCNTs demonstrated peaks at 300.98 nm, have a broad peak 2θ = 23.5...

Journal: :Advanced electronic materials 2023

The large-scale synthesis of high-purity semiconducting single-walled carbon nanotubes (s-SWCNTs) plays a crucial role in fabricating high-performance and multiapplication-scenario electronics. This work develops straightforward, continuous, scalable method to synthesize individual s-SWCNTs with small-diameters distribution (≈1 nm). It is believed that the water dioxide resulting from decomposi...

Journal: :Scientific reports 2016
Ramy El-Sayed Kunal Bhattacharya Zonglin Gu Zaixing Yang Jeffrey K Weber Hu Li Klaus Leifer Yichen Zhao Muhammet S Toprak Ruhong Zhou Bengt Fadeel

We report a detailed computational and experimental study of the interaction of single-walled carbon nanotubes (SWCNTs) with the drug-metabolizing cytochrome P450 enzyme, CYP3A4. Dose-dependent inhibition of CYP3A4-mediated conversion of the model compound, testosterone, to its major metabolite, 6β-hydroxy testosterone was noted. Evidence for a direct interaction between SWCNTs and CYP3A4 was a...

2012
Kombiah Iyakutti

The results of hydrogenation of single walled carbon nanotubes (SWCNTs)-SnO2 composite thin film is reported here. SWCNTs mixed with SnO2 by weight are made into pellet without any binder. Then, the pellet is evaporated by electron beam on glass substrates at room temperature in hydrogen atmosphere. The amount of hydrogen incorporated in the SWCNTs-SnO2 composite is found to be 2.4 wt.%. In add...

Journal: :Advanced materials 2014
Shota Ushiba Satoru Shoji Kyoko Masui Junichiro Kono Satoshi Kawata

Direct laser writing through two-photon polymerization lithography is used to fabricate 3D nanostructures containing aligned single-wall carbon nanotubes (SWCNTs). SWCNTs are aligned in the laser scanning directions while they are embedded in the structure. The alignment is induced by spatial confinement, volume shrinkage, and the optical gradient force. This method is expected to lead to new a...

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