[1] Univ Malaysia Perlis, Inst Nano Elect Engn, Kangar 01000, Malaysia
[2] Univ Malaysia Perlis, Sch Bioproc Engn, Arau 02600, Malaysia
[3] Univ Malaysia Perlis, Sch Microelect Engn, Arau 02600, Malaysia
[4] Univ Teknol PETRONAS, Dept Mech Engn, Seri Iskandar 32610, Perak Darul Rid, Malaysia
[5] Univ Teknol PETRONAS, Ctr Innovat Nanostruct & Nanodevices COINN, Seri Iskandar 32610, Perak Darul Rid, Malaysia