Browsing by Author "Huang, PC"

Now showing 1 - 3 of 3

A channel borrowing scheme in a cellular radio system with guard channels and finite queues
(1996)
Chang, CJ
;
Huang, PC
;
Su, TT
;
電信工程研究所
;
Institute of Communications Engineering
Selective deposition of gold nanoparticles on SiO(2)/Si nanowires for molecule detection
(2005-04-01)
Sheu, JT
;
Chen, CC
;
Huang, PC
;
Lee, YK
;
Hsu, ML
The selective deposition of gold nanoparticles on the surface of N-(2-Aminoethyl)-3-aminopropyl-trimethoxysilane (AEAPTMS)-pretreated silicon nanowire (SiNW)s for molecule detection was demonstrated. The SiNWs were fabricated by scanning probe lithography (SPL) and tetramethyl ammonium hydroxide (TMAH) wet etching. The width and height of the SiNWs were 60 nm and 10 nm, respectively. The gold nanoparticles were synthesized by the chemical reduction method. The electronic properties of the SiNWs in response to the binding of different molecules on the surface of the SiNWs subsequently were discussed. A dynamic observation of the change in conductance was conducted to monitor the reaction between gold nanoparticles and the AEAPTMS-pretreated surface of the SiNWs. The reaction of gold nanoparticles on the surface of the SiNWs took about 750 s before conductance saturation. Finally, an engineered enzyme, KSI-126C, with a thiol terminal was designed to bind with the gold nanoparticles on the surface of the SiNWs. Shifts in turn-on voltage in I-V(ds) characteristics have clearly been observed after the binding of molecules and gold nanoparticles.
Selective deposition of gold nanoparticles on SiO2/Si nanowire
(2005-03-01)
Sheu, JT
;
Chen, CC
;
Huang, PC
;
Hsu, ML
;
材料科學與工程學系奈米科技碩博班
We demonstrate selective deposition of citrate-passivated gold nanoparticles onto silicon dioxide patterns. Further, selective deposition of gold nanoparticles on the oxides, generated by scanning probe lithography (SPL). surface of silicon nanowire is achieved. Main methodology is to form H-terminated silicon surface and hydroxyl group on SiO2 sample surface, then link amino function group only on SiO2 surface by self-assembly mechanism. N-(2-Aminoethyl)-3-aminopropyl-trimethoxysilane (AEAPTMS) pretreated sample was immersed in the gold colloidal solution such that the NH2 group become protonated forming NH3+. The NH3+ groups provide a negative charge bindable environment for citrate-passivated gold nanoparticles. Impact on different AEAPTMS dilute solvents is also investigated for the performance of selective deposition of gold nanoparticles. It is found that H-terminated sample surface effectively eliminated nonspecific reaction during silanization such that microscale or nanoscale selective deposition of gold nanoparticles is obtainable. The proposed method can be applied in both nanoelectronics and nanobiosensors. (c) 2005 Elsevier B.V. All rights reserved.