New Invention Profile
| Publication No: | IN202411019849 [India] | Application No: | IN202411019849 |
| Title: | One-pot, single-step ultrasonication method for preparation of white-light-emitting graphene quantum dots from coal soot | ||
| Publication Date: | 26-09-2025 | File Date: | 15-03-2024 |
| Inventor(s): | Singh, Vikram; Mishra, Shiv Rag; Mandal, Tuhin | ||
| IPC Classification: | C01B0032184, B82Y004000, B82Y003000, C01B0032182, C09K001165 | ||
| Abstract: | A one-pot and single-step ultrasonic method to synthesize white-light-emitting graphene quantum dots from coal soot in just 2 minutes at room temperature. The white-light emission is achieved in solution and polymeric film with good Commission Internationale del'Eclairage (CIE) index (0.28, 0.33) and (0.25, 0.30), respectively. The graphene quantum dots cover a significant fraction of the visible region in the emission spectrum with two prominent bands at 475 and 635 nm at 380 nm photoexcitation, corresponding to monomer and J-aggregate emission. The strong reducing and basic nature of the ethylene diamine facilitated the preparation of self-assembled J-aggregate graphene quantum dots through hydrogen bonding and electrostatic interaction. Apart from optoelectronics application, the prepared graphene quantum dots have a tremendous application in the fields of biomedical (bioimaging, drug carriers, theranostics, etc.), anti-counterfeiting coatings, sensing, device preparation, solar cells and light-harvesting application. |
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: director[at]cimfr[dot]res[dot]in
:91-326-2296023
:https://www.cimfr.nic.in