課題番号 ：S-14-JI-0022
利用形態 ：技術代行
利用課題名（日本語） ：蛍光性金属ナノクラスターの開発と評価
Program Title (English) ：Development of fluorescent metal nanoclusters
利用者名（日本語） ：黄鑫1), 井上康志2)
Username (English) ：X. Huang1), Y. Inouye2)
所属名（日本語） ：1) 大阪大学大学院生命機能研究科
Affiliation (English) ：1) FBS, Osaka University

１．概要（Summary ）
Platinum nanoclusters (Pt NCs) consisting of a few to several tens of atoms exhibit molecule-like behaviors such as photoluminescence due to quantum size effect. Here, we synthesized fluorescent aqueous Pt NCs by a facile and versatile method using polyethyleneimine (PEI) as a stabilizing agent.

２．実験（Experimental）
Pt NCs were prepared by a facile and versatile method using PEI as stabilizer. The oxide state of Pt NCs was identified by X-ray photoelectron spectroscopy(XPS) (Pass energy 80 eV and 20 eV).

３．結果と考察（Results and Discussion）
XPS analysis was carried out to identify the oxide state of Pt NCs. As shown in Fig. 1, the and 4f5/2 BEs of Pt NCs are at 72.4 and 75.9 eV, which is belong to the range of Pt(0)4f7/2, (71.3-72.4 eV). Thus, the oxide state of our Pt NCs is 0, which means our Pt NCs were reduced to zero state.

Fig. 1 The XPS spectra of Pt NCs (Pass energy at 80 eV).

４．その他・特記事項（Others）
なし

５．論文・学会発表（Publication/Presentation）
準備中

６．関連特許（Patent）
なし