Title: Controlling Anisotropic Growth of Colloidal ZnSe Nanostructures

Abstract

Semiconductor nanocrystals serve as outstanding model systems for studying quantum confined size and shape effects. Shape control is an important knob for controlling their properties but so far it has been well developed mainly for heavy-metal containing semiconductor nanocrystals, limiting their further widespread utilization. We report a synthesis of heavy-metal free ZnSe nanocrystals with shape and size control through utilization of well-defined molecular clusters. In this approach, ZnSe nanowires are synthesized and their length and shape control is achieved by introduction of controlled amounts of molecular clusters. As a result of [Zn₄(SPh)₁₀](Me₄N)₂ clusters (Zn₄ clusters) addition, short ZnSe nanorods or ZnSe nanodots can be obtained through tuning the ratio of Zn₄ clusters to ZnSe. A study using transmission electron microscopy revealed the formation of a hybrid inorganic–organic nanowire, whereby the ligands form a template for self-assembly of ZnSe magic size clusters. The hybrid nanowire template becomes shorter and eventually disappears upon increasing amount of Zn₄ clusters in the reaction. The generality of the method is demonstrated by using isostructural [Cu₄(SPh)₆](Me₄N)₂ clusters, which presented a new approach to Cu doped ZnSe nanocrystals and provided also a unique opportunity to employ X-ray absorption fine structure spectroscopy for deciphering the changes in themore » local atomic-scale environment of the clusters and explaining their role in the process of the nanorods formation. The introduction of molecular clusters presented here opens a path for growth of colloidal semiconductor nanorods, expanding the palette of materials selection with obvious implications for optoelectronic and biomedical applications.« less

Authors:

Ning, Jiajia  ^[1];

• Search DOE PAGES for author "Ning, Jiajia"
• Search DOE PAGES for ORCID "0000-0002-7922-5469"

Liu, Jing ^[2]; Levi-Kalisman, Yael ^[3]; Frenkel, Anatoly I.  ^[4];

• Search DOE PAGES for author "Frenkel, Anatoly I."
• Search DOE PAGES for ORCID "0000-0002-5451-1207"

Banin, Uri  ^[1]

• Search DOE PAGES for author "Banin, Uri"
• Search DOE PAGES for ORCID "0000-0003-1698-2128"

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+ Show Author Affiliations

1. Hebrew Univ. of Jerusalem (Israel). Inst. of Chemistry. The Center for Nanoscience and Nanotechnology
2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering; Manhattan College, Riverdale, NY (United States). Dept. of Physics
3. Hebrew Univ. of Jerusalem (Israel). The Center for Nanoscience and Nanotechnology. Inst. of Life Sciences
4. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry

Publication Date:

Thu Aug 30 00:00:00 EDT 2018

Research Org.:

Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States); Hebrew Univ. of Jerusalem (Israel)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); United States-Israel Binational Science Foundation (BSF)

OSTI Identifier:

1485251

Report Number(s):

BNL-209665-2018-JAAM
Journal ID: ISSN 0002-7863

Grant/Contract Number:  

SC0012704; AC02-76SF00515; AC02-06CH11357; CHE-1719534; 2013/610

Resource Type:

Accepted Manuscript

Journal Name:

Journal of the American Chemical Society

Additional Journal Information:

Journal Volume: 140; Journal Issue: 44; Journal ID: ISSN 0002-7863

Publisher:

American Chemical Society (ACS)

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY