Water-Soluble Silicon Quantum Dots with Wavelength-Tunable Photoluminescence

被引：222

作者：

Kang, Zhenhui ^{[1
,2
,3
,4
]}

Liu, Yang ^{[1
,2
,3
,4
]}

Tsang, Chi Him A. ^{[1
,2
]}

Ma, Dorothy Duo Duo ^{[1
,3
]}

Fan, Xia ^{[1
,3
,5
]}

Wong, Ning-Bew ^{[1
,2
]}

Lee, Shuit-Tong ^{[1
,3
]}

机构：

[1] COSDAF, Hong Kong, Hong Kong, Peoples R China

[2] City Univ Hong Kong, Dept Biol & Chem, Hong Kong, Hong Kong, Peoples R China

[3] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China

[4] Soochow Univ, Funct Nano & Soft Mat Lab FUNSOM, Sch Chem & Chem Engn, Suzhou, Jiangsu, Peoples R China

[5] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing, Peoples R China

来源：

ADVANCED MATERIALS | 2009年 / 21卷 / 06期

关键词：

NANOCRYSTALS; NANOPARTICLES; NANOCLUSTERS;

D O I：

10.1002/adma.200801642

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

H-terminated Si quantum dots (Si QDs) with 3 nm diameter are converted to water-soluble uniform-sized Si QDs after controlled oxidation in an EtOH/H2O2 solution. These dots present Si/SiOxHy core/shell nanostructures and can be finely tuned to emit light in seven different colors due to the quantum size effect in the Si cores, exhibiting excellent photocatalytic activity in the visible range.

引用

页码：661 / +

页数：5

共 23 条

[1] Quantum dots as photosensitizers? [J].

Bakalova, R ;

Ohba, H ;

Zhelev, Z ;

Ishikawa, M ;

Baba, Y .

NATURE BIOTECHNOLOGY, 2004, 22 (11) :1360-1361

[2] Observation of a magic discrete family of ultrabright Si nanoparticles [J].

Belomoin, G ;

Therrien, J ;

Smith, A ;

Rao, S ;

Twesten, R ;

Chaieb, S ;

Nayfeh, MH ;

Wagner, L ;

Mitas, L .

APPLIED PHYSICS LETTERS, 2002, 80 (05) :841-843

[3]

CANHUM LT, 1990, APPL PHYS LETT, V57, P1066

[4] From microporous to mesoporous molecular sieve materials and their use in catalysis [J].

Corma, A .

CHEMICAL REVIEWS, 1997, 97 (06) :2373-2419

[5]

English DS, 2002, NANO LETT, V2, P681, DOI 10.1021/n1025538c

[6] Time-resolved photoluminescence studies of the energy transfer from excitons confined in Si nanocrystals to oxygen molecules [J].

Fujii, M ;

Kovalev, D ;

Goller, B ;

Minobe, S ;

Hayashi, S ;

Timoshenko, VY .

PHYSICAL REVIEW B, 2005, 72 (16)

[7] Chemical reaction mediated by excited states of Si nanocrystals -: Singlet oxygen formation in solution [J].

Fujii, M ;

Usui, M ;

Hayashi, S ;

Gross, E ;

Kovalev, D ;

Künzner, N ;

Diener, J ;

Timoshenko, VY .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (07) :3689-3693

[8] Efficient surface grafting of luminescent silicon quantum dots by photoinitiated hydrosilylation [J].

Hua, FJ ;

Swihart, MT ;

Ruckenstein, E .

LANGMUIR, 2005, 21 (13) :6054-6062

[9] Silicon quantum dots: A general photocatalyst for reduction, decomposition, and selective oxidation reactions [J].

Kang, Zhenhui ;

Tsang, Chi Him A. ;

Wong, Ning-Bew ;

Zhang, Zhendong ;

Lee, Shuit-Tong .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (40) :12090-+

[10] A polyoxometalate-assisted electrochemical method for silicon nanostructures preparation: From quantum dots to nanowires [J].

Kang, Zhenhui ;

Tsang, Chi Him A. ;

Zhang, Zhendong ;

Zhang, Mingliang ;

Wong, Ning-Bew ;

Zapien, J. Antonio ;

Shan, Yueyue ;

Lee, Shuit-Tong .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (17) :5326-+

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