Perbandingan sifat optik Karbon Dots (C-Dots) dari daun mangga kering dan segar

Arini Qurrata A'yun, Isnaeni Isnaeni, D Tahir, N M Ramlan, R H Putri

Abstract


Karbon dots (C-dots) merupakan nanopartikel karbon dengan sifat berpendar dan dapat disintesis dari berbagai sumber karbon.Tantangan sintesis C-Dots adalah memanfaatkan sumber daya alam sebagai bahan bakunya. Dalam penelitian ini, sintesis C-Dots dari daun mangga kering dan daun mangga segar telah berhasil dilakukan. C-Dots yang dihasilkan dari kedua bahan ini berbentuk koloid. Sintesis C-Dots dengan metode buttom up dengan cara radiasi microwave selama 30 menit. Sifat fisis warna C-Dots daun mangga kering menunjukkan warna cokelat gelap, sedangkan sifat fisis warna C-Dots daun mangga segar menunjukkan warna kuning terang. C-Dots daun mangga kering memiliki spektrum absorbansi cahaya pada panjang gelombang 290- 433 nm dengan intensitas tertinggi terukur pada panjang gelombang 382 nm. Sedangkan, untuk C-Dots daun mangga segar memiliki spektrum absorbansi cahaya pada panjang gelombang 290-385 nm dengan intensitas tertinggi terukur pada panjang gelombang 351 nm. Spektrum emisi C-Dots juga memperlihatkan perbedaan antara C-Dots dari daun mangga segar dan daun mangga kering.

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