CHED 484 |
| Thin films of gold nanoparticles deposited on substrates are being investigated for use in a variety of applications, ranging from biosensing to microelectronics. Often the gold nanoparticle thin films are created by using a coupling agent to chemically link the nanoparticle and substrate. Here, we report the moderate- to long-term stability of gold nanoparticle thin films on glass substrates. Specifically, clean glass substrates are exposed to 3-aminopropyltrimethoxysilane to create a surface with accessible amines. This substrate is then exposed to a solution of gold nanoparticles, which adsorb through interaction with the terminal amine. Finally, the gold nanoparticle-coated glass samples are immersed in a solution containing an alkanethiol to form a self-assembled monolayer on the gold nanoparticles. The functionalized nanoparticle thin films are characterized using contact angle analysis and optical methods. Parameters affecting the longitudinal stability of the nanoparticle films, such as nanoparticle size and alkanethiol type, will be discussed. |
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Undergraduate Research Poster Session: Nanotechnology
11:00 AM-1:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Chemical Education |