Using Gelatin as Protecting Agent and Organic Template to Synthesize Noble Metal Nanoparticles and Metal Nanoparticles@Mesoporous Silica for SERS and CO Oxidation Applications

作者：Chang Hsuan Jung; Yang Ying Mei; Lin Chi Chang; Luo Yi Chia; Chang Hsien Chang; Lin Hong Ping^*; Lin Yu Cheng; Tang Chih Yuan; Lin Chin Yen

来源：Sensors and Materials, 2008, 20(8): 389-396.

• nanoparticles
• mesoporous silica
• gelatin
• template
• CO oxidation
• SERS

With excellent control of their synthetic compositions and condition, noble metal nanoparticles@mesoporous silicas of large surface area (approximate to 300 m(2)g(-1)), large pore size (> 5.0 nm), and high noble metal nanoparticle content (approximate to 10 wt.%) have been conveniently prepared using natural polymer gelatin with many amide (-CO-NH2) groups as an organic template of mesoporous silica and a protecting agent for stabilizing Au nanoparticles. This synthetic method is extensive and can be used to prepare Au, Ag, and Ag-Au alloy nanoparticles@mesoporous silicas. Because the metal nanoparticles are accessible to the environment, noble-metal nanoparticles@mesoporous silicas can be used in SERS applications and act as superior catalysts in CO oxidation at high temperatures. In addition, bare Au nanoparticles anchored on a silica matrix can have direct contact with S. aureus cells to enhance the Raman spectrum intensity of S. aureus cells absorbed onto a Au nanoparticles@mesoporous silica.

• 出版日期2008