نوع مقاله : مقاله پژوهشی
نویسندگان
1 پژوهشکده فوتونیک و فن‌آوری‌های کوانتومی، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی، صندوق پستی: 836-14395، تهران – ایران
2 گروه نانوالکترونیک، پژوهشکده علوم و فناوری نانو، دانشگاه کاشان، صندوق پستی: 8731753153، کاشان- ایران
چکیده
در این مقاله نانوکره‌های سطحی دوفلزی مس- طلا و مس- نقره با استفاده از تابش لیزر اگزایمر ArF با طول موج nm 193 و پهنای تپ ns 15 بر نمونه‌های لایه نازک شامل دو لایه فلزی لایه‌نشانی شده بر سطح شیشه BK7 ایجاد شدند. چگالی و شکل ساختارها در شرایط متفاوت تابش‌دهی به‌دست آمد و ویژگی‌های اپتیکی، مورفولوژی و پایداری ساختارهای بهینه مس- طلا و مس- نقره مقایسه شدند. نتایج به‌دست آمده نشان می‌دهد نانوکره‌های دوفلزی هسته- پوسته مس- طلا با چگالی بالا و پاسخ اپتیکی و پایداری مناسب در شار انرژی 2mJ/cm 150 و تعداد 5 تپ لیزری به‌دست می‌آید. نانوساختارهای نقره- مس چگالی کم‌تر و پاسخ اپتیکی و پایداری ضعیف‌تری نشان دادند. نانوساختارهای مس- طلا به‌دست آمده برای استفاده در کاربردهای پلاسمونیکی نظیر نانوحسگر زیستی و طیف‌سنجی رامان تقویت شده سطحی مناسب هستند.
کلیدواژه‌ها
عنوان مقاله [English]
Comparison of optical and structural properties and stability of copper-silver and copper-gold surface nanostructures fabricated by laser irradiation
نویسندگان [English]
- S. Panahibakhsh 1
- F. Mansuri 1
- M. Nikoufard 2
1 Photonics and Quantum Technologies Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 14395-836, Tehran - Iran
2 Department of Nanoelectronics, Research Institute of Science and Nanotechnology, Kashan University, P.O.Box: 8731753153, Kashan - Iran
چکیده [English]
In this paper, copper-gold and copper-silver bimetallic surface nanospheres were formed using ArF excimer laser irradiation with a wavelength of 193 nm and a duration of 15 ns on thin film samples consisting of two metal layers deposited on BK7 glass. The density and shape of the structures were obtained under different irradiation conditions. The optical properties, morphology, and stability of optimal copper-gold and copper-silver structures were compared. The results show that high-density copper-gold core-shell nanospheres with high optical response and stability are produced at a fluence of 150 mJ/cm2 and 5 laser pulses. Silver-copper nanostructures showed lower density, weaker optical response, and lower stability than other nanostructures. The obtained copper-gold nanostructures are suitable for use in plasmonic applications such as biosensors and surface-enhanced Raman spectroscopy.
کلیدواژه‌ها [English]
- Plasmonic
- Bimetallic nanostructures
- ArF excimer laser
- Localized surface plasmon resonance
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