One- and two-photon excited fluorescence of CdSe and CdSe/ZnS quantum dots in n-hexane

被引：7

作者：

Hao Zhong-Hua ^{[1
]}

Gong Hong-Mei

Han Jun-Bo

Zhai Yue-Ying

Wang Qu-Quan

机构：

[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Minist Educ, Key Lab Acoust & Opt Mat & Devices, Wuhan 430072, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2006年 / 23卷 / 10期

关键词：

D O I：

10.1088/0256-307X/23/10/064

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

One- and two-photon absorption and excited fluorescence of the CdSe and the core-shell structure CdSe/ZnS quantum dots (QDs) in n-hexane is investigated. The linear and nonlinear absorption coefficients are measured and the two-photon-absorption cross sections of the QDs are also obtained. For both one-photon fluorescence and two-photon fluorescence, the emission efficiency of CdSe/ZnS is much higher than that of CdSe, originating from the effective surface passivation of the core-shell structure.

引用

页码：2859 / 2862

页数：4

共 25 条

[1] Counting single native biomolecules and intact viruses with color-coded nanoparticles [J].

Agrawal, A ;

Zhang, CY ;

Byassee, T ;

Tripp, RA ;

Nie, SM .

ANALYTICAL CHEMISTRY, 2006, 78 (04) :1061-1070

[2] Folate-receptor-mediated delivery of InP quantum dots for bioimaging using confocal and two-photon microscopy [J].

Bharali, DJ ;

Lucey, DW ;

Jayakumar, H ;

Pudavar, HE ;

Prasad, PN .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (32) :11364-11371

[3] Nonlinear multiphoton processes in organic and polymeric materials [J].

Bhawalkar, JD ;

He, GS ;

Prasad, PN .

REPORTS ON PROGRESS IN PHYSICS, 1996, 59 (09) :1041-1070

[4] Semiconductor nanocrystals as fluorescent biological labels [J].

Bruchez, M ;

Moronne, M ;

Gin, P ;

Weiss, S ;

Alivisatos, AP .

SCIENCE, 1998, 281 (5385) :2013-2016

[5] Surface effects on capped and uncapped nanocrystals [J].

Bryant, GW ;

Jaskolski, W .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (42) :19650-19656

[6] Quantum dot bioconjugates for ultrasensitive nonisotopic detection [J].

Chan, WCW ;

Nie, SM .

SCIENCE, 1998, 281 (5385) :2016-2018

[7] (CdSe)ZnS core-shell quantum dots: Synthesis and characterization of a size series of highly luminescent nanocrystallites [J].

Dabbousi, BO ;

RodriguezViejo, J ;

Mikulec, FV ;

Heine, JR ;

Mattoussi, H ;

Ober, R ;

Jensen, KF ;

Bawendi, MG .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (46) :9463-9475

[8]

Denk Winfried, 1995, P445

[9] Single-step synthesis to control the photoluminescence quantum yield and size dispersion of CdSe nanocrystals [J].

Donegá, CD ;

Hickey, SG ;

Wuister, SF ;

Vanmaekelbergh, D ;

Meijerink, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (02) :489-496

[10] Third-order non-linear spectroscopy of CdSe and CdSe/ZnS core shell quantum dots [J].

Gerdova, I ;

Haché, A .

OPTICS COMMUNICATIONS, 2005, 246 (1-3) :205-212

← 1 2 3 →