نوع مقاله : پژوهشی

نویسندگان

1 دانشگاه رازی کرمانشاه

2 گروه فیزیک دانشکده علوم، دانشگاه رازی، کرمانشاه، ایران

3 دانشگاه ملایر

چکیده

نقاط کوانتومی از پوست پرتقال به روش هیدروترمال با موفقیت سنتز شد. نتیجه طیف پراش اشعه ایکس نشان می‌دهد که نمونه دارای نقاط کوانتومی می‌باشد. از آنالیز طیف سنجی پراش انرژی پرتو ایکس می‌توان نتیجه گرفت که ساختار کربن با درصد وزنی66 درصد شکل گرفته است. جهت بررسی گروه‌های عاملی سطح نیز از آنالیز طیف سنجی تبدیل فوریه مادون قرمز استفاده شد که وجود عنصر اکسیژن بدلیل وجود گروه‌های عاملی دپوکسی و هیدروکسیل و فعال بودن سطح نقاط کوانتومی را نشان داد. از آنالیز میکروسکوپ الکترونی روبشی گسیل میدانی نمونه دارای ریخت کروی گونه می‌باشد. از بررسی خواص نوری داریم که نمونه در طول موج تحریک 350 نانومتر بیشترین خاصیت فلورسانس را از خود نشان می‌دهد و تحت لامپ فرابنفش دارای رنگ سبز می‌باشد. جهت بررسی خواص ساختاری و گروه‌های عاملی از آنالیزهای طیف پراش اشعه ایکس، طیف سنجی پراش انرژی پرتو ایکس، طیف سنجی تبدیل فوریه مادون قرمز و میکروسکوپ الکترونی روبشی گسیل میدانی استفاده شد. جهت بررسی خواص نوری از دو آنالیز مرئی- فرابنفش و فوتولومینسانس استفاده گردید.

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