Synthesis and evaluation of photoluminescent metal nanoclusters

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360026
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: Osaka University
• Principal Investigator: INOUYE Yasushi 大阪大学, 生命機能研究科, 教授 (60294047)
• Co-Investigator(Renkei-kenkyūsha): ISHITOBI Hidekazu 大阪大学, 生命機能研究科, 助教 (20372633)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 金属ナノクラスター / 光物性制御 / 蛍光プローブ / 白金原子 / バイオイメージング / ナノフォトニクス

Outline of Final Research Achievements

We have established a synthetic method of platinum nanoclusters that acquire luminescent ability due to discretization of electronic states in a limited number of atoms. Green and yellow emitting platinum nanoclusters were synthesized via reduction of platinum ions after formation of complex in dendrimers or polymer. Then, optical properties, molecular weight, electronic states and size of the nanoclusters were measured and evaluated. Bio-imaging of chemokine receptors expressed in HeLa cells was achieved through surface modification of the green-emitting platinum nanoclusters. Finally, we demonstrated that the yellow-emitting platinum nanoclusters work as metal ion sensors and pH sensors via intensity change of photoluminescence.

Free Research Field

ナノフォトニクス