title: Facile one-step sonochemical synthesis of ultrafine and stable fluorescent C-dots.
abstract: This work describes a one-step synthesis of carbon dots (C-dots), which is carried out by sonication of polyethylene glycol (PEG-400) for 0.5-3h. The effect of the various experimental parameters, such as sonication time, amplitude and temperature on the size and the fluorescence of the C-dots was studied. It was found that the average diameter of the C-dots is between 2 and 9 nm, depending on the preparation conditions. The highest quantum yield of emission was ∼ 16%. These high fluorescence properties of the C-dots could be used for bioimaging and for solar cell applications.
authors.affiliation: Bar-Ilan Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Vijay Bhooshan
authors.initials: VB
authors.lastname: Kumar
authors.affiliation: Division of Chemistry, Nuclear Research Center-Negev, Be'er Sheva 84190, Israel; Institute of Applied Research, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel.
authors.forename: Ze'ev
authors.initials: Z
authors.lastname: Porat
authors.affiliation: Bar-Ilan Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel; National Cheng Kung University, Department of Materials Science & Engineering, Tainan 70101, Taiwan. Electronic address: gedanken@mail.biu.ac.il.
authors.forename: Aharon
authors.initials: A
authors.lastname: Gedanken
keywords: C-dots; Fluorescence; PEG-400; Quantum yield; Sonochemistry