Effect of 100 MeV Nickel Ions on Silica Coated ZnS Quantum Dots

被引：43

作者：

Nath, S. S. ^{[1
]}

Chakdar, D. ^{[1
]}

Gope, G. ^{[1
]}

Avasthi, D. K. ^{[2
]}

机构：

[1] Natl Inst Technol Silchar, Dept Phys, Silchar 788010, Assam, India

[2] IUAC, New Delhi 110067, India

来源：

JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS | 2008年 / 3卷 / 02期

关键词：

Quantum Dots; Ion Irradiation; Green Luminescence; Zn Vacancy;

D O I：

10.1166/jno.2008.212

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 [电气工程]; 0809 [电子科学与技术];

摘要：

We report synthesis, optical absorption and luminescence spectroscopy of Ni+7 ion irradiated ZnS semiconductor quantum dots over coated with Silica (SiO2) embedded in PVA matrix. Quantum dot samples are prepared via Chemical route. 100 MeV Nickel ion is selected for the irradiation experiment with different doses of 1 x 10(11), 3 x 10(11), 3 x 10(12) and 10(13) ions/cm(2). With an increase in doses, the optical absorption edge of irradiated quantum dots reveal negligible shift with respect to that of unirradiated (virgin) quantum dots. This phenomenon clearly indicates no appraisable change in particle size under ion irradiation which is confirmed from high resolution transmission electron microscope images. It has been observed that like virgin samples, irradiated quantum dots produce similar kind of green luminescence but the emission intensity increases significantly after irradiation due to creation of Zn vacancies by ion irradiation.

引用

页码：180 / 183

页数：4

共 20 条

[1]

[Anonymous], 2003, INTRO NANOTECHNOLOGY

[2]

Synthesis and characterization of zinc sulfide nanostructures [J].

Biswas, S ;

Kar, S ;

Chaudhuri, S .

SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY, 2006, 36 (01) :33-36

[3]

Multilayered titania, silica, and Laponite nanoparticle coatings on polystyrene colloidal templates and resulting inorganic hollow spheres [J].

Caruso, RA ;

Susha, A ;

Caruso, F .

CHEMISTRY OF MATERIALS, 2001, 13 (02) :400-409

[4]

Trilayer hybrid polymer-quantum dot light-emitting diodes [J].

Chaudhary, S ;

Ozkan, M ;

Chan, WCW .

APPLIED PHYSICS LETTERS, 2004, 84 (15) :2925-2927

[5]

Absorption and luminescence of the surface states in ZnS nanoparticles [J].

Chen, W ;

Wang, ZG ;

Lin, ZJ ;

Lin, LY .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (06) :3111-3115

[6]

DREXLER KE, 1992, NANOSYSTEM MOL MACHI

[7]

Photoluminescence investigation of the carrier recombination processes in ZnO quantum dots and nanocrystals [J].

Fonoberov, VA ;

Alim, KA ;

Balandin, AA ;

Xiu, FX ;

Liu, JL .

PHYSICAL REVIEW B, 2006, 73 (16)

[8]

Radiative lifetime of excitons in ZnO nanocrystals: The dead-layer effect [J].

Fonoberov, VA ;

Balandin, AA .

PHYSICAL REVIEW B, 2004, 70 (19) :1-5

[9]

Structural, optical and photoluminescence properties of ZnS: Cu nanoparticle thin films as a function of dopant concentration and quantum confinement effect [J].

Jayanthi, K. ;

Chawla, S. ;

Chander, H. ;

Haranath, D. .

CRYSTAL RESEARCH AND TECHNOLOGY, 2007, 42 (10) :976-982

[10]

Synthesis of elongated Au nanoparticles in silica matrix by ion irradiation [J].

Mishra, Y. K. ;

Singh, F. ;

Avasthi, D. K. ;

Pivin, J. C. ;

Malinovska, D. ;

Pippel, E. .

APPLIED PHYSICS LETTERS, 2007, 91 (06)

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