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Naito T. Development of a Control Method for Conduction and Magnetism in Molecular Crystals. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160295] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Wang G, Mitomo H, Matsuo Y, Niikura K, Maeda M, Ijiro K. DNA-modulated photo-transformation of AgCl to silver nanoparticles: visiting the formation mechanism. J Colloid Interface Sci 2015; 452:224-234. [PMID: 25957236 DOI: 10.1016/j.jcis.2015.04.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 04/10/2015] [Indexed: 11/17/2022]
Abstract
Solution-phase synthesis and post-synthetic bio-modification have continued to play a dominant role in preparation of nanostructured biomaterials. Heterogeneous nucleation and growth that occur much more often in nature, however, remain rarely explored in nano-biomaterials research. We have newly developed a DNA-modulated photoconversion approach to uniform silver nanoparticles that afford DNA-directed recognition and multi-mode imaging. The present study was aimed at understanding the rapid heterogeneous nucleation and growth of AgNPs at the solid-liquid interface with the aid of DNA. Dynamic changes in absorbance, size and morphology of silver nanostructures were monitored and analyzed to clarify the growth kinetics, which indicated a synthetic route involving synchronous growth of silver nanostructures and the fragmentation and consumption of AgCl. Various stabilizers, including polymer and amino acids, were assessed and compared with respect to the efficacy in photoconversion of AgCl. DNA was found to offer the best monodispersity and the smallest diameter for the resultant AgNPs, due to its strong interactions to silver species as well as excellent charge dispersion ability. By controlling the physicochemical property of DNA through choice of pH and ionic strength, we have demonstrated tunable structure and composition of the nanoparticles.
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Affiliation(s)
- Guoqing Wang
- Research Institute for Electronic Science, Hokkaido University, Kita21, Nishi10, Kita-Ku, Sapporo 001-0021, Japan; Bioengineering Laboratory, RIKEN, 2-1 Hirosawa Wako, Saitama 351-0198, Japan
| | - Hideyuki Mitomo
- Research Institute for Electronic Science, Hokkaido University, Kita21, Nishi10, Kita-Ku, Sapporo 001-0021, Japan; JST-CREST, Sanban-Cho 5, Chiyoda-Ku, Japan
| | - Yasutaka Matsuo
- Research Institute for Electronic Science, Hokkaido University, Kita21, Nishi10, Kita-Ku, Sapporo 001-0021, Japan; JST-CREST, Sanban-Cho 5, Chiyoda-Ku, Japan
| | - Kenichi Niikura
- Research Institute for Electronic Science, Hokkaido University, Kita21, Nishi10, Kita-Ku, Sapporo 001-0021, Japan; JST-CREST, Sanban-Cho 5, Chiyoda-Ku, Japan
| | - Mizuo Maeda
- Bioengineering Laboratory, RIKEN, 2-1 Hirosawa Wako, Saitama 351-0198, Japan
| | - Kuniharu Ijiro
- Research Institute for Electronic Science, Hokkaido University, Kita21, Nishi10, Kita-Ku, Sapporo 001-0021, Japan; JST-CREST, Sanban-Cho 5, Chiyoda-Ku, Japan.
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Wang G, Mitomo H, Matsuo Y, Shimamoto N, Niikura K, Ijiro K. DNA-templated plasmonic Ag/AgCl nanostructures for molecular selective photocatalysis and photocatalytic inactivation of cancer cells. J Mater Chem B 2013; 1:5899-5907. [DOI: 10.1039/c3tb20954g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sahyun MRV. From the Editor. J Imaging Sci Technol 2007. [DOI: 10.2352/j.imagingsci.technol.(2007)51:3(iv)] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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