Journal
ACS APPLIED NANO MATERIALS
Volume 4, Issue 6, Pages 5636-5642Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c00740
Keywords
plasma synthesis; nanotechnology; colloidal; graphene; metal ion detection
Funding
- Ministry of Science and Technology (MOST) of Taiwan [MOST 107-2218-E-006-054-MY3, MOST 107-2628-E-011-002-MY3]
- National Research Foundation of Korea [NRF-MSIT-2020R1C1-C1010373, KSC-2020-CRE-0013]
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A sustainable microplasma synthesis method for graphene quantum dots (GQDs) as fluorescent sensors for Cu2+ detection is presented. GQDs are synthesized from starch at ambient conditions using microplasma-liquid synthesis, showing selective detection of Cu2+ with high quenching ratio and low limit of detection. The study includes detailed density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations to explain fluorescence quenching mechanism due to the forbidden emission process of excited electrons, offering insights into charge transfer process for fluorescent-based metal ion detection.
A sustainable microplasma synthesis of GQDs as fluorescent sensors for Cu2+ detection is reported. The GQDs are synthesized from starch at ambient conditions using microplasma-liquid synthesis. The prepared GQDs exhibit selective detection of Cu2+ with high quenching ratio and low limit of detection (LoD) of 0.5 mu M. Detailed density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations show that fluorescence quenching occurs due to the forbidden emission process of the excited electrons. This work presents a sustainable and scalable method to synthesize GQDs and provides insight into the charge transfer process for fluorescent-based metal ion detection.
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