Influence of cysteine doping on photoluminescence intensity from semiconducting single-walled carbon nanotubes

被引：10
|
作者：
Kurnosov, N. V. [1 ]
Leontiev, V. S. [1 ]
Linnik, A. S. [1 ]
Karachevtsev, V. A. [1 ]
机构：
[1] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
来源：
CHEMICAL PHYSICS LETTERS | 2015年 / 623卷
关键词：
AMINO-ACIDS; LUMINESCENCE; DITHIOTHREITOL; ENHANCEMENT; ADSORPTION;
D O I：
10.1016/j.cplett.2015.01.046
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：
Photoluminescence (PL) from semiconducting single-walled carbon nanotubes can be applied for detection of cysteine. It is shown that cysteine doping (from 10(-8) to 10(-3) M) into aqueous suspension of nanotubes with adsorbed DNA leads to increase of PL intensity. The PL intensity was enhanced by 27% at 10(-3) M cysteine concentration in suspension. Most likely, the PL intensity increases due to the passivation of p-defects on the nanotube by the cysteine containing reactive thiol group. The effect of doping with other amino acids without this group (methionine, serine, aspartic acid, lysine, proline) on the PL intensity is essentially weaker. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：51 / 54
页数：4
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