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We have studied the radiation of a double-walled carbon nanotube
(DWNT) filament with a length of 4.5\,mm and a diameter of
10\,$\mu$m by applying an electric current through the filament. The
DWNT filament starts emitting incandescent light at voltage
$U=6$\,V. Emission spectra of the DWNT below temperature 1250\,K can
well be fitted to those of the blackbody radiation. The intensity of
the incandescent light shows an exponential dependence on the
voltage applied on the DWNT filaments. The resistance of the DWNT
filaments is very stable at high temperatures between 900 and
1250\,K during the emission of light in the experiments. 相似文献
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本文采用傅里叶红外光谱法分别对几种西药阿莫西林胶囊、利君沙片、吗丁啉片、康必得片样品进行了检测鉴别分析。由于西药的有效成份明确,分子结构确定,各分子基团的振动红外光谱谱峰具有明显的对应特征,故而快速检测鉴别出各组西药样品中均有假药存在,而且检测出这些假药均是由一种制药的辅料——糊精所制成。 相似文献
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