COALESCENCE THRESHOLD TEMPERATURE N AG NANOSLAND GROWTH BY PULSED LASER DEPOSITION

سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 498

فایل این مقاله در 10 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

UFGNSM03_165

تاریخ نمایه سازی: 10 تیر 1396

چکیده مقاله:

In this study, Ag nanoislands were deposited on glass and Si(100) at substrate temperature from 25 to 450 °C by Pulsed Laser Depositions (PLD). The growth of Ag nanoislands was evidenced from optical absorption surface plasmon resonance (SPR) bands. SPR peaks was not evidently observed in the spectrum of sample deposited at 25 °C, but sample deposited at 150 °C presented a broad SPR peak around A-870 nm SPR peak showed a blue shift to 540-550 nm and become narrower as the substrate temperature increases, Atomic Force Microscope (AFM) showed that by increasing deposition temperature to 350 and 450 °C, Agislands grow in height and diameter and the number of island decrease among the surface. Two-probe measurement of electrical resistance offilms was also recorded during deposition processes to recognize the coalescence of Ag nanoislands. The results show that the deposition at temperatures below 250 C leads to a sharp decrease in film resistance while at higher temperatures the islands were separated without resistance decline. To determine coalescence threshold temperature, resistance variation was measured for a cooling substrate, from 300 down to 200 °C, substrate. The result revealed that the coalescence of Ag begins near 230 C.

کلیدواژه ها:

نویسندگان

MEHDIR ANQUBLAR

Physics Department, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran

PARVTZ KAMELI

Physics Department, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Iran

HADI SALAMATI

Physics Department, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱ II, Iran