| AVS 54th International Symposium | |
| Nanometer-scale Science and Technology | Tuesday Sessions |
| Session NS-TuP |
| Session: | Nanometer-scale Science and Technology Poster Session I |
| Presenter: | B.-Y. Jeong, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Republic of Korea |
| Authors: | B.-Y. Jeong, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Republic of Korea J.-W. Park, Sungkyunkwan University, Republic of Korea J.-S. Kim, SAINT, Sungkyunkwan University, Republic of Korea N.H. Kim, Sungkyunkwan University, Republic of Korea Y.H. Roh, Sungkyunkwan University, Republic of Korea |
| Correspondent: | Click to Email |
Silicon nanoparticles (Si NPs) have many interesting electronic properties such as controllable electron mobility and energy band-gap through doping impurities despite their nanometer-scaled size. They are widely used in LED, photo-luminescent label, sensor, etc. Si NPs could be also applied to nano-size semiconductor. However, pure Si in nature makes natural oxide-layer. Moreover, Si NPs which were not functionalized lost their characteristics of nanoparticles for aggregating each other because the pure Si has unsatisfactory stability. Therefore, the surface of Si NPs should be modified in order to disperse and stabilize Si NPs. In this study, Si NPs were coated by siloxane that has amine terminal to stabilize and modify the surface of Si NPs to the positively charged surface coincidently. It led to prevent an aggregation and chemical reactions of surface. After treatment, Si NPs were dispersed in solution and had positively charged surface. The raw Si NPs were treated with piranha etch to remove the oxide layer and make a hydroxyl surface. In order to induce hydrosilylation, we added 3-aminopropyltriethoxysilane with gentle stirring. TEM was carried out to check the rate of dispersion. EDX and FTIR analyses were performed to confirm the hydrosilylation reaction. Zeta-potential was measured in order to estimate the charge of particle surface. Consequently, we expected that the stable siloxane-coated Si NPs with positively charged surface have possible applications to conjugate with phosphate of DNA or other polymer with negative charge.