ICCAS OpenIR
The influence of carboxyl groups on the photoluminescence of mercaptocarboxylic acid-stabilized CdTe nanoparticles
Zhang, H; Zhou, Z; Yang, B; Gao, MY
2003-01-09
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume107Issue:1Pages:8-13
AbstractThe CdTe narroparticles were prepared in aqueous solution using different mercaptocarboxylic acids such as 3-mercaptopropionic acid (MPA) and thioglycolic acid (TGA) as stabilizing agents following the synthetic route described in ref 9. The pH-dependent photoluminescence (PL) of MPA- and TGA-stabilized CdTe nanoparticles was systematically investigated before and after addition of poly(acrylic acid) (PAA) into the CdTe solutions. Experimental results reveal that lowering the pH can increase the PL efficiency of both MPA- and TGA-stabilized CdTe. Moreover, the PL of the CdTe can further be increased in the presence of PAA in low pH range. X-ray photoelectron spectroscopy (XPS) was employed to investigate the interaction between the carboxyl groups from PAA and CdTe nanoparticles which were assembled in polymer matrix by a layer-by-layer self-assembly method to exclude interference from other species in CdTe solutions. XPS results demonstrate that the S/Te ratio of CdTe particles decreases after the addition of PAA, which strongly suggests that PAA can strongly interact with CdTe narroparticles via the coordination between carboxyl groups and cadmium ions on the particle surface. As a result, the PL efficiency of the mercaptocarboxylic acid-stabilized CdTe narroparticles is enhanced in acidic range.
DOI10.1021/jp025910c
Indexed BySCI
Language英语
WOS IDWOS:000180254900003
PublisherAMER CHEMICAL SOC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80616
Collection中国科学院化学研究所
Corresponding AuthorYang, B
Affiliation1.Jilin Univ, Dept Chem, Key Lab Supramol Struct & Mat, Changchun 130023, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, H,Zhou, Z,Yang, B,et al. The influence of carboxyl groups on the photoluminescence of mercaptocarboxylic acid-stabilized CdTe nanoparticles[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2003,107(1):8-13.
APA Zhang, H,Zhou, Z,Yang, B,&Gao, MY.(2003).The influence of carboxyl groups on the photoluminescence of mercaptocarboxylic acid-stabilized CdTe nanoparticles.JOURNAL OF PHYSICAL CHEMISTRY B,107(1),8-13.
MLA Zhang, H,et al."The influence of carboxyl groups on the photoluminescence of mercaptocarboxylic acid-stabilized CdTe nanoparticles".JOURNAL OF PHYSICAL CHEMISTRY B 107.1(2003):8-13.
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