Preparation of multi-walled carbon nanotubes/SiO 2 core–shell nanocomposites by a two-step Stöber process

Micro & nano letters

article

Chang Sun¹  Kangning Sun³ 

[1] Co-Innovation Center of Green Building, Shandong Jianzhu University;School of Material Science and Engineering, Shandong Jianzhu University;Engineering Ceramics Key Laboratory of Shandong Province, Shandong University (south part)

关键词: silicon compounds;    multi-wall carbon nanotubes;    nanocomposites;    core-shell nanostructures;    nanofabrication;    surface treatment;    amorphous state;    oxidation;    Fourier transform infrared spectra;    X-ray diffraction;    transmission electron microscopy;    X-ray chemical analysis;    multiwalled carbon nanotubes;    core-shell nanocomposites;    two-step Stober process;    surface modification;    surface functionalisation;    MWNT;    solubilisation;    biocompatibility;    toxicity;    amorphous silica;    carboxylic functional group;    oxidation;    concentrated sulphuric acid-nitric acid mixture;    Fourier-transform infrared spectroscopy;    X-ray powder diffraction;    transmission electron microscopy;    energy dispersive spectrometry;    C-SiO2;   

DOI  :  10.1049/mnl.2015.0441

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Objectives: To compare ultrasound guidance (USG) and electrical neurostimulation guidance (ENSG) in axillary brachial plexus block in terms of block performing time, sensory and motor block quality, and patient satisfaction. Methodology: 200 patients undergoing elective carpal tunnel syndrome surgery were randomly assigned to one of two groups; the USG group or the ENSG group. Axillary blocks were performed with a mixture of 15 ml of lidocaine 2% and 15 ml of bupivacaine 0.5% (a total of 30 ml solution). Sensory block was evaluated with a pinprick test and motor block was evaluated via the Bromage scale by a blinded observer. Results: Block performing time was significantly shorter in the USG group than in the ENSG group (P<0.001). The sensory and motor block onset times were significantly shorter and the additional analgesic requirements were significantly lower in the USG group than in the ENSG group (P<0.001). Conclusion: USG is better than ENSG in axillary brachial plexus block in terms of block performing time, block quality and patient satisfaction.

【 授权许可】

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