Octapod-Shaped Colloidal Nanocrystals of Cadmium Chalcogenides via "One-Pot" Cation Exchange and Seeded Growth

被引：164

作者：

Deka, Sasanka ^{[1
]}

Miszta, Karol ^{[1
]}

Dorfs, Dirk ^{[1
]}

Genovese, Alessandro ^{[1
]}

Bertoni, Giovanni ^{[1
]}

Manna, Liberato ^{[1
]}

机构：

[1] Ist Italiano Tecnol, I-16163 Genoa, Italy

来源：

NANO LETTERS | 2010年 / 10卷 / 09期

关键词：

Quantum dot; semiconductor; heterostructure; tetrapod; octapod; multipod; INORGANIC NANOCRYSTALS; IONIC NANOCRYSTALS; NANORODS; AMPLIFICATION; ALLOY; ROD;

D O I：

10.1021/nl102539a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The growth behavior of cadmium chalcogenides (CdE = CdS, CdSe, and CdTe) on sphalerite Cu2-xSe nanocrystals (size range 10-15 nm) is studied. Due to the capability of Cu2-xSe to undergo a fast and quantitative cation exchange reaction in the presence of excessive Cd2+ ions, no Cu2-xSe/CdE heterostructures are obtained and instead. branched CdSe/CdE nanocrystals are built which consist of a sphalerite CdSe core and wurtzite CdE arms. While CdTe growth yields multiarmed structures with overall tetrahedral symmetry, CdS and CdSe arm growth leads to octapod-shaped nanocrystals. These results differ significantly from literature findings about the growth of CdE on sphalerite CdSe particles, which until now had always yielded tetrapod-shaped nanocrystals.

引用

收藏

页码：3770 / 3776

页数：7

相关论文

共 33 条

[1] PbS sub-micrometer structures with anisotropic shape: Ribbons, wires, octapods, and hollowed cubes [J].

Bashouti, M. ;

Lifshitz, E. .

INORGANIC CHEMISTRY, 2008, 47 (02) :678-682

[2] Rapid phosphine-free growth of diverse CdSe multipods via microwave irradiation route [J].

Cao, Xuebo ;

Zhao, Cui ;

Lan, Xianmei ;

Yao, Dan ;

Shen, Wenjun .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 474 (1-2) :61-67

[3] Multiple wurtzite twinning in CdTe nanocrystals induced by methylphosphonic acid [J].

Carbone, L ;

Kudera, S ;

Carlino, E ;

Parak, WJ ;

Giannini, C ;

Cingolani, R ;

Manna, L .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (03) :748-755

[4] Synthesis and micrometer-scale assembly of colloidal CdSe/CdS nanorods prepared by a seeded growth approach [J].

Carbone, Luigi ;

Nobile, Concetta ;

De Giorgi, Milena ;

Sala, Fabio Delia ;

Morello, Giovanni ;

Pompa, Pierpaolo ;

Hytch, Martin ;

Snoeck, Etienne ;

Fiore, Angela ;

Franchini, Isabella R. ;

Nadasan, Monica ;

Silvestre, Albert F. ;

Chiodo, Letizia ;

Kudera, Stefan ;

Cingolani, Roberto ;

Krahne, Roman ;

Manna, Liberato .

NANO LETTERS, 2007, 7 (10) :2942-2950

[5] Manipulative synthesis of multipod frameworks for self-organization and self-amplification of Cu2O microcrystals [J].

Chang, Y ;

Zeng, HC .

CRYSTAL GROWTH & DESIGN, 2004, 4 (02) :273-278

[6] In Situ and Ex Situ Studies of Platinum Nanocrystals: Growth and Evolution in Solution [J].

Cheong, Soshan ;

Watt, John ;

Ingham, Bridget ;

Toney, Michael F. ;

Tilley, Richard D. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (40) :14590-14595

[7] Controlled Growth and Magnetic Property of FePt Nanostructure: Cuboctahedron, Octapod, Truncated Cube, and Cube [J].

Chou, Shang-Wei ;

Zhu, Chun-Ling ;

Neeleshwar, Sonnathi ;

Chen, Cheng-Lung ;

Chen, Yang-Yuan ;

Chen, Chia-Chun .

CHEMISTRY OF MATERIALS, 2009, 21 (20) :4955-4961

[8] Electrical transport through a single nanoscale semiconductor branch point [J].

Cui, Y ;

Banin, U ;

Björk, MT ;

Alivisatos, AP .

NANO LETTERS, 2005, 5 (07) :1519-1523

[9] Phosphine-Free Synthesis of p-Type Copper(I) Selenide Nanocrystals in Hot Coordinating Solvents [J].

Deka, Sasanka ;

Genovese, Alessandro ;

Zhang, Yang ;

Miszta, Karol ;

Bertoni, Giovanni ;

Krahne, Roman ;

Giannini, Cinzia ;

Manna, Liberato .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (26) :8912-+

[10] Mechanical and electrical properties of CdTe tetrapods studied by atomic force microscopy [J].

Fang, Liang ;

Park, Jeong Young ;

Cui, Yi ;

Alivisatos, Paul ;

Shcrier, Joshua ;

Lee, Byounghak ;

Wang, Lin-Wang ;

Salmeron, Miquel .

JOURNAL OF CHEMICAL PHYSICS, 2007, 127 (18)

← 1 2 3 4 →