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Synthesis of hexagonal close-packed gold nanostructures

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Synthesis of hexagonal close-packed gold nanostructures
นักวิจัย : Huang, Xiao , Li, Shaozhou , Huang, Yizhong , Wu, Shixin , Zhou, Xiaozhu , Li, Shuzhou , Gan, Chee Lip , Boey, Freddy Yin Chiang , Mirkin, Chad A. , Zhang, Hua
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Huang, X., Li, S., Huang, Y., Wu, S., Zhou, X., Li, S., et al. (2011). Synthesis of hexagonal close-packed gold nanostructures. Nature Communications, 2(292). , 2041-1723 , http://hdl.handle.net/10220/10514 , http://dx.doi.org/10.1038/ncomms1291
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Nature communications
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Solid gold is usually most stable as a face-centred cubic (fcc) structure. To date, no one has synthesized a colloidal form of Au that is exclusively hexagonal close-packed (hcp) and stable under ambient conditions. Here we report the first in situ synthesis of dispersible hcp Au square sheets on graphene oxide sheets, which exhibit an edge length of 200–500 nm and a thickness of ~ 2.4 nm (~ 16 Au atomic layers). Interestingly, the Au square sheet transforms from hcp to a fcc structure on exposure to an electron beam during transmission electron microscopy analysis. In addition, as the square sheet grows thicker (from ~ 2.4 to 6 nm), fcc segments begin to appear. A detailed experimental analysis of these structures shows that for structures with ultrasmall dimensions (for example, <~ 6 nm thickness for the square sheets), the previously unobserved pure hcp structure becomes stable and isolable.

บรรณานุกรม :
Huang, Xiao , Li, Shaozhou , Huang, Yizhong , Wu, Shixin , Zhou, Xiaozhu , Li, Shuzhou , Gan, Chee Lip , Boey, Freddy Yin Chiang , Mirkin, Chad A. , Zhang, Hua . (2554). Synthesis of hexagonal close-packed gold nanostructures.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Huang, Xiao , Li, Shaozhou , Huang, Yizhong , Wu, Shixin , Zhou, Xiaozhu , Li, Shuzhou , Gan, Chee Lip , Boey, Freddy Yin Chiang , Mirkin, Chad A. , Zhang, Hua . 2554. "Synthesis of hexagonal close-packed gold nanostructures".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Huang, Xiao , Li, Shaozhou , Huang, Yizhong , Wu, Shixin , Zhou, Xiaozhu , Li, Shuzhou , Gan, Chee Lip , Boey, Freddy Yin Chiang , Mirkin, Chad A. , Zhang, Hua . "Synthesis of hexagonal close-packed gold nanostructures."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Huang, Xiao , Li, Shaozhou , Huang, Yizhong , Wu, Shixin , Zhou, Xiaozhu , Li, Shuzhou , Gan, Chee Lip , Boey, Freddy Yin Chiang , Mirkin, Chad A. , Zhang, Hua . Synthesis of hexagonal close-packed gold nanostructures. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.