Blue-green luminescent carbon nanodots produced in a silica matrix

被引：14

作者：

Brito, Jackeline Barbosa ^{[1
]}

Haas Costa, Tania Maria ^{[2
]}

Rodembusch, Fabiano Severo ^{[2
]}

Konowalow, Anthony Silveira ^{[1
]}

Souza dos Reis, Roberto Moreno ^{[3
]}

Balzaretti, Naira Maria ^{[1
]}

Herz da Jornada, Joao Alziro ^{[1
,4
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil

[3] Univ Fed Rio Grande do Sul, Ctr Nanociencia & Nanotecnol CNANO, BR-91501970 Porto Alegre, RS, Brazil

[4] Inst Nacl Metrol Qualidade & Tecnol INMETRO, BR-20261232 Rio De Janeiro, RJ, Brazil

来源：

CARBON | 2015年 / 91卷

关键词：

HIGH-PRESSURE; DOTS; PHOTOLUMINESCENCE; NANOPARTICLES; NANOCRYSTALS; FLUORESCENCE; GRAPHENE; NITROGEN;

D O I：

10.1016/j.carbon.2015.04.062

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Blue-green luminescent carbon nanodots entrapped in silica matrix were produced by the pyrolysis of methyl groups well dispersed on the edges of nanometric grains of silica (Aero-sil (R) R974) previously cold sintered under high pressure. Selected Area Electron Diffraction and Electron Energy Loss Spectroscopy analyses confirmed the formation of carbon nanodots with graphitic sp(2) bonds, without additional passivation technique. Photoluminescence spectra were dependent on the excitation wavelength and the higher emission intensity was observed in the range between 450 and 500 nm for the sample cold sintered at 7.7 GPa and thermal treated at 800 degrees C, corresponding to a total fluorescence quantum yield of about 11%. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：234 / 240

页数：7

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