Resonant Raman study of phonons in high-quality colloidal CdTe nanoparticles

被引：41

作者：

Dzhagan, V. ^{[1
]}

Valakh, M. Ya. ^{[1
]}

Kolny-Olesiak, J. ^{[2
]}

Lokteva, I. ^{[2
]}

Zahn, D. R. T. ^{[3
]}

机构：

[1] Natl Acad Sci Ukraine, VE Lashkaryov Inst Semicond Phys, UA-03028 Kiev, Ukraine

[2] Carl VonOssietzky Univ Oldenburg, Inst Phys, D-26111 Oldenburg, Germany

[3] Tech Univ Chemnitz, D-09107 Chemnitz, Germany

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 24期

关键词：

cadmium compounds; colloids; II-VI semiconductors; nanoparticles; phonons; Raman spectra; OPTICAL PHONONS; QUANTUM DOTS; GLASS MATRIX; NANOCRYSTALS; SIZE; SPECTRA; SCATTERING; SPECTROSCOPY; DISORDER; SULFUR;

D O I：

10.1063/1.3153987

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on a resonant Raman scattering study of colloidal CdTe nanoparticles (NPs). The perfect crystallinity and narrow size distribution of the NPs allowed at least three additional spectral features near the main longitudinal optical phonon peak to be resolved at 50 K. We assign these features to scattering by transverse (145 cm(-1)) and surface (159 cm(-1)) optical phonon modes as well as to a combined optical-acoustic phonon mode(s) (180-200 cm(-1)). Both the transverse and combined optical-acoustic phonon modes were not reported previously for CdTe NPs.

引用

页数：3

共 27 条

[1] Resonant Raman studies of compositional and size dispersion of CdS1-xSex nanocrystals in a glass matrix [J].

Azhniuk, YM ;

Milekhin, AG ;

Gomonnai, AV ;

Lopushansky, VV ;

Yukhymchuk, VO ;

Schulze, S ;

Zenkevich, EI ;

Zahn, DRT .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (49) :9069-9082

[2] Interplay of factors affecting Raman scattering in cadmium chalcogenide nanocrystals in dielectric media [J].

Azhniuk, Yu M. ;

Hutych, Yu I. ;

Lopushansky, V. V. ;

Raevskaya, A. E. ;

Stroyuk, A. L. ;

Kuchmiy, S. Ya ;

Gomonnai, A. V. ;

Zahn, D. R. T. .

XIII INTERNATIONAL SEMINAR ON PHYSICS AND CHEMISTRY OF SOLIDS, 2007, 79

[3] THE EFFECTS OF MICROCRYSTAL SIZE AND SHAPE ON THE ONE PHONON RAMAN-SPECTRA OF CRYSTALLINE SEMICONDUCTORS [J].

CAMPBELL, IH ;

FAUCHET, PM .

SOLID STATE COMMUNICATIONS, 1986, 58 (10) :739-741

[4] Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers [J].

Cicek, Neslihan ;

Nizamoglu, Sedat ;

Ozel, Tuncay ;

Mutlugun, Evren ;

Karatay, Durmus Ugur ;

Lesnyak, Vladimir ;

Otto, Tobias ;

Gaponik, Nikolai ;

Eychmueller, Alexander ;

Demir, Hilmi Volkan .

APPLIED PHYSICS LETTERS, 2009, 94 (06)

[5] Size effects on the phonon spectra of quantum dots in CdTe-doped glasses [J].

dePaula, AM ;

Barbosa, LC ;

Cruz, CHB ;

Alves, OL ;

Sanjurjo, JA ;

Cesar, CL .

APPLIED PHYSICS LETTERS, 1996, 69 (03) :357-359

[6]

DZHAGAN V, J APPL PHYS UNPUB

[7] Size effects on Raman spectra of small CdSe nanoparticles in polymer films [J].

Dzhagan, V. M. ;

Valakh, M. Ya ;

Raevskaya, A. E. ;

Stroyuk, A. L. ;

Kuchmiy, S. Ya ;

Zahn, D. R. T. .

NANOTECHNOLOGY, 2008, 19 (30)

[8] Raman Spectroscopy of nanomaterials: How spectra relate to disorder, particle size and mechanical properties [J].

Gouadec, Gwenael ;

Colomban, Philippe .

PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS, 2007, 53 (01) :1-56

[9] Raman spectra of semiconductor nanoparticles: Disorder-activated phonons [J].

Ingale, A ;

Rustagi, KC .

PHYSICAL REVIEW B, 1998, 58 (11) :7197-7204

[10] FORBIDDEN ONE-LO-PHONON RESONANT RAMAN-SCATTERING AND MULTIPHONON SCATTERING IN PURE CDTE CRYSTALS [J].

ISLAM, SS ;

RATH, S ;

JAIN, KP ;

ABBI, SC ;

JULIEN, C ;

BALKANSKI, M .

PHYSICAL REVIEW B, 1992, 46 (08) :4982-4985

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