Publication

Selective formation of Ag domains on MnO nanooctapods for potential dual imaging probes

조회수 : 192 등록일 : 2016.07.14 00:00

저자 : Seo, WS (Seo, Won Seok)
출처 : CRYSTENGCOMM
출판일 : 2016.07.01
 
 
Selective formation of Ag domains on MnO nanooctapods for potential dual imaging probes
 
 
Shin, D (Shin, Dongwoo)[ 1,2 ] ; Park, Y (Park, Youngchan)[ 1,2 ] ; Ryu, H (Ryu, Hyein)[ 1,2 ] ; Seo, WS (Seo, Won Seok)[ 3,4 ] ; Song, H (Song, Hyunjoon)[ 1,2 ]
 
 
[ 1 ] Korea Adv Inst Sci & Technol, Dept Chem, Daejeon 34141, South Korea
[ 2 ] Inst for Basic Sci Korea, Ctr Nanomat & Chem React, Daejeon 34141, South Korea
[ 3 ] Sogang Univ, Dept Chem, Seoul 04107, South Korea
[ 4 ] Sogang Univ, Inorgan & Bio Mat BK21, Seoul 04107, South Korea
 
 
 
In the present study, the growth of Ag domains on the surface of MnO octapods yielded a uniform MnO octapod-Ag heterodimer structure by a phase-transfer protocol in toluene. The Ag domains were selectively formed on one of the high index surfaces of the MnO octapods. The resulting MnO-Ag heterodimers have basically two independent domains. On this basis, multiple functions are expected, including plasmon light scattering from the Ag domains and magnetic resonance from the MnO domains. Notably, the heterodimers strongly scattered visible light at 420 nm, and even a single particle signal could be detected in a dark-field spectroscopy image. The scattering peak was extended to the near-IR range by the formation of MnO octapod-AgAu hollow heterodimers via a galvanic replacement reaction. The heterodimers also showed weak ferromagnetism at low temperature, and exhibited a positive T-1 signal in magnetic resonance imaging. These properties demonstrate that the MnO-Ag heterodimers can potentially serve as dual imaging probes for biological systems.
 
 
 
 
 
 
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