Modification by thermal annealing of the luminescent characteristics of CdSe quantum dots in gelatin films

被引：4

作者：

Borkovska, L. V. ^{[1
]}

Korsunska, N. O. ^{[1
]}

Stara, T. R. ^{[1
]}

Dzhagan, V. M. ^{[1
]}

Stroyuk, O. L. ^{[2
]}

Raevska, O. Ye. ^{[2
]}

Kryshtab, T. G. ^{[3
]}

机构：

[1] NAS Ukraine, V Lashkaryov Inst Semicond Phys, Prospect Nauky 41, UA-03028 Kiev, Ukraine

[2] NAS Ukraine, L Pysarzhevsky Inst Phys Chem, UA-03028 Kiev, Ukraine

[3] Inst Politecn Nacl, ESFM, Dept Phys, UPALM, Mexico City 07738, DF, Mexico

来源：

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 8-9 | 2012年 / 9卷 / 8-9期

关键词：

CdSe; quantum dots; gelatin; photoluminescence; COLLOIDAL CDSE; PHOTOLUMINESCENCE; NANOPARTICLES;

D O I：

10.1002/pssc.201100605

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of thermal annealing on the photoluminescence (PL), PL excitation (PLE) and Raman scattering spectra of CdSe quantum dots (QDs) in gelatin films is studied. The X-ray diffraction reveals the presence of CdSe QDs with a size of about 3 nm in the film. Thermal annealing of the QDs at 100 degrees C in air results in a red shift of the PL bands as well as in changes in the temperature dependence of the PL intensity. In the PLE spectra the maximum associated with the light absorption by the QDs shifts to the red region also. The effects are found to be reversible. The passivation of CdSe nanocrystals with ZnS shell reduces the effects. In the Raman scattering spectra, the position of LO phonon peak of CdSe QDs does not change upon annealing. The effects are explained by the break of the bonds of cadmium surface atoms with functional groups of gelatin molecules. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1779 / 1782

页数：4

共 20 条

[1] Jelly dots: Synthesis and cytotoxicity studies of CdTe quantum dot-gelatin nanocomposites [J].

Byrne, Stephen J. ;

Williams, Yvonne ;

Davies, Anthony ;

Corr, Serena A. ;

Rakovich, Aliaksandra ;

Gun'ko, Yurii K. ;

Rakovich, Yury R. ;

Donegan, John F. ;

Volkov, Yuri .

SMALL, 2007, 3 (07) :1152-1156

[2] High pressure photoluminescence and Raman investigations of CdSe/ZnS core/shell quantum dots [J].

Fan, H. M. ;

Ni, Z. H. ;

Feng, Y. P. ;

Fan, X. F. ;

Kuo, J. L. ;

Shen, Z. X. ;

Zou, B. S. .

APPLIED PHYSICS LETTERS, 2007, 90 (02)

[3] Optical transitions in charged CdSe quantum dots [J].

Franceschetti, A ;

Zunger, A .

PHYSICAL REVIEW B, 2000, 62 (24) :R16287-R16290

[4] The effect of annealing and photoactivation on the optical transitions of band-band and surface trap states of colloidal quantum dots in PMMA [J].

Hu, Lian ;

Wu, Huizhen ;

Du, Lingxiao ;

Ge, Hongying ;

Chen, Xin ;

Dai, Ning .

NANOTECHNOLOGY, 2011, 22 (12)

[5] NUCLEATION AND GROWTH OF CDSE ON ZNS QUANTUM CRYSTALLITE SEEDS, AND VICE VERSA, IN INVERSE MICELLE MEDIA [J].

KORTAN, AR ;

HULL, R ;

OPILA, RL ;

BAWENDI, MG ;

STEIGERWALD, ML ;

CARROLL, PJ ;

BRUS, LE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (04) :1327-1332

[6] ELECTROOPTICAL EVIDENCE FOR THE CHELATE EFFECT AT SEMICONDUCTOR SURFACES [J].

LISENSKY, GC ;

PENN, RL ;

MURPHY, CJ ;

ELLIS, AB .

SCIENCE, 1990, 248 (4957) :840-843

[7] Compressive and tensile stress in colloidal CdSe semiconductor quantum dots [J].

Meulenberg, RW ;

Jennings, T ;

Strouse, GF .

PHYSICAL REVIEW B, 2004, 70 (23) :1-5

[8] SYNTHESIS AND CHARACTERIZATION OF NEARLY MONODISPERSE CDE (E = S, SE, TE) SEMICONDUCTOR NANOCRYSTALLITES [J].

MURRAY, CB ;

NORRIS, DJ ;

BAWENDI, MG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (19) :8706-8715

[9] Preparation of colloidal CdSe and CdS/CdSe nanoparticles from sodium selenosulfate in aqueous polymers solutions [J].

Raevskaya, Alexandra E. ;

Stroyuk, Alexander L. ;

Kuchmiy, Stephan Ya. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2006, 302 (01) :133-141

[10] Biosensing with luminescent semiconductor quantum dots [J].

Sapsford, Kim E. ;

Pons, Thomas ;

Medintz, Igor L. ;

Mattoussi, Hedi .

SENSORS, 2006, 6 (08) :925-953

← 1 2 →