Sifat Optik Carbon Dots (C-Dots) dari Daun Bambu Hasil Sintesis Hijau Berbantukan Gelombang Mikro

Permono Adi Putro; Akhiruddin Maddu

doi:10.17509/wafi.v4i1.15569

Authors

Permono Adi Putro Program Studi Pendidikan Fisika, Universitas Muhammadiyah Prof. Dr. Hamka, Indonesia
Akhiruddin Maddu Departemen Fisika, Institut Pertanian Bogor, Indonesia

DOI:

https://doi.org/10.17509/wafi.v4i1.15569

Keywords:

C-dots, konsentrasi prekursor, sifat optik, sintesis hijau, gelombang mikro

Abstract

Carbon dots (C-dots) adalah tipe baru dari nanopartikel berpendar yang dapat mudah disintesis dari sumber alami. Sintesis C-dots dari daun bambu telah berhasil dilakukan menggunakan teknik sintesis hijau berbantukan gelombang mikro. Teknik sintesis hijau dilakukan dengan menggunakan air sebagai pelarut non-kimia dan sumber alami. Sintesis dilakukan menggunakan variasi konsentrasi prekursor untuk dipelajari pengaruhnya terhadap sifat fisik dan sifat optiknya. Sifat fisik C-dots menunjukkan warna transparan di bawah cahaya tampak, dan warna hijau di bawah laser UV 405 nm. Sifat optik C-dots dikarakterisasi menggunakan spektrofotometer UV-Vis, dan spektrofotometer dengan sumber eksitasi 405 nm. Konsentrasi prekursor mempengaruhi intensitas eksitasi dan emisi, namun pergeseran Stokes C-dots memiliki kestabilan yang sangat baik dalam larutan berair. Pergeseran Stokes berasal dari keadaan transisi n–π* dari struktur ikatan aromatik C=O pada permukaan C-dots. Kami peroleh C-dots yang berpotensi untuk diaplikasikan sebagai bioimaging seluler in vivo dan in vitro dan biosensing ion logam dan garam.

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