In situ extended x-ray absorption fine structure study of initial processes in CdSe nanocrystals formation using a microreactor

被引：24

作者：

Uehara, M. ^{[1
]}

Sun, Z. H. ^{[2
,3
]}

Oyanagi, H. ^{[2
,3
]}

Yamashita, K. ^{[1
]}

Fukano, A. ^{[2
]}

Nakamura, H. ^{[1
]}

Maeda, H. ^{[1
,4
,5
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanotechnol Res Inst, Micro & NanoSpace Chem Grp, Tosu, Saga 8410052, Japan

[2] Natl Inst Adv Ind Sci & Technol, Photon Res Inst, Tsukuba, Ibaraki 3058568, Japan

[3] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[4] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Dept Mol & Mat Sci, Fukuoka 8168580, Japan

[5] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 06期

基金：

日本学术振兴会;

关键词：

cadmium compounds; EXAFS; fluorescence; II-VI semiconductors; nanostructured materials; nanotechnology; nucleation; semiconductor growth; GROWTH-KINETICS; QUANTUM DOTS; CDTE; NUCLEATION; CLUSTERS; AMINES; SIZE;

D O I：

10.1063/1.3080660

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The nucleation process of CdSe nanocrystals is studied by fluorescence-detected extended x-ray absorption fine structure (EXAFS) using a microreactor and synchrotron radiation. Detailed analysis of in situ Se K-edge EXAFS data measured along a microreactor channel revealed a strong position-dependence which displays a rapid increase in the CdSe phase with time at the initial stage. The results indicate that the CdSe nucleation completes within several seconds starting from trioctylphosphine Se solution and dodecylamine surfactant at 240 degrees C. This shows the promising capability of in situ EXAFS combined with a microreactor to investigate the nucleation process of nanocrystals synthesized in a solvent.

引用

页数：3

共 24 条

[1] NMR analysis of surfaces and interfaces in 2-nm CdSe [J].

Berrettini, MG ;

Braun, G ;

Hu, JG ;

Strouse, GF .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (22) :7063-7070

[2] Nucleation and growth kinetics of CdSe nanocrystals in octadecene [J].

Bullen, CR ;

Mulvaney, P .

NANO LETTERS, 2004, 4 (12) :2303-2307

[3] Chemistry and properties of nanocrystals of different shapes [J].

Burda, C ;

Chen, XB ;

Narayanan, R ;

El-Sayed, MA .

CHEMICAL REVIEWS, 2005, 105 (04) :1025-1102

[4] Surface structure of cadmium selenide nanocrystallites [J].

Carter, AC ;

Bouldin, CE ;

Kemner, KM ;

Bell, MI ;

Woicik, JC ;

Majetich, SA .

PHYSICAL REVIEW B, 1997, 55 (20) :13822-13828

[5] The kinetics of growth of semiconductor nanocrystals in a hot amphiphile matrix [J].

Dushkin, CD ;

Saita, S ;

Yoshie, K ;

Yamaguchi, Y .

ADVANCES IN COLLOID AND INTERFACE SCIENCE, 2000, 88 (1-2) :37-78

[6] CdSe nanocrystal quantum-dot memory [J].

Fischbein, MD ;

Drndic, M .

APPLIED PHYSICS LETTERS, 2005, 86 (19) :1-3

[7] Synthesis and surface composition study of CdSe nanoclusters prepared using solvent systems containing primary, secondary, and tertiary amines [J].

Foos, EE ;

Wilkinson, J ;

Mäkinen, AJ ;

Watkins, NJ ;

Kafafi, ZH ;

Long, JP .

CHEMISTRY OF MATERIALS, 2006, 18 (12) :2886-2894

[8] From Cd-rich to Se-rich - The manipulation of CdSe nanocrystal surface stoichiometry [J].

Jasieniak, Jacek ;

Mulvaney, Paul .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (10) :2841-2848

[9] Structure-property correlation of CdSe clusters using experimental results and first-principles DFT calculations [J].

Jose, R ;

Zhanpeisov, NU ;

Fukumura, H ;

Baba, Y ;

Ishikawa, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (02) :629-636

[10]

KONINGSBERGER DC, 1988, XRAY ABSORPTION PRIN, P91103

← 1 2 3 →