Fluorescence Quenching by Förster Resonance Energy Transfer in Carbon–Cadmium Sulfide Core-Shell Quantum Dots

Surana, Karan; Bhattacharya, Bhaskar

doi:10.1021/acsomega.1c04529

Cited by 7 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TEM image (figure 3(A)) shows OEC-CDs having spherical shape, with an average particle size of ∼15.7 nm. The UV-Vis absorption spectrum (figure 3(B)) of OEC-CDs shows a miniature peak around 360 nm, a sharp peak at 280 nm, and a shoulder peak around 225 nm in accordance with previous report [21]. The PL spectrum (figure 1(C)) of OEC-CDs was recorded at an excitation wavelength of 360 nm.…”

Section: Tem and Optical Characterization Of Cdssupporting

confidence: 88%

Recyclable luminescent carbon dots nanopaper for flexible electronics

Abulikemu

Tabrizi

Mofarah

et al. 2023

Flex. Print. Electron.

View full text Add to dashboard Cite

The use of sustainable materials in high-tech devices is one way to decrease the carbon footprint and tackle global climate change. We first synthesized blue-emissive carbon dots from biocompatible onion inner epidermal cells using Solvothermal method. Then, cellulose nanofiber was prepared by TEMPO oxidization, followed by homogenisation from soft wood source. Finally, the blue emissive carbon dots-cellulose nanofibers-based nanopaper was fabricated by simple roller-coating approach, and its optical and morphological properties were investigated by Transmittance, PL, FTIR and SEM techniques. The results indicate that nanopapers have a high light emission, and that their transparency may be easily adjusted by varying the proportion of carbon dots content. These nanopapers can be incorporated into flexible and stretchable electronics and optical sensor platforms.

show abstract

Section: Tem and Optical Characterization Of Cdssupporting

confidence: 88%

Recyclable luminescent carbon dots nanopaper for flexible electronics

Abulikemu

Tabrizi

Mofarah

et al. 2023

Flex. Print. Electron.

View full text Add to dashboard Cite

show abstract

“…Given that the realization of a direct electron transfer mechanism necessitates energy level matching, investigation of the energy transfer in a core–shell structure becomes crucial as it can promote electron–hole pair generation and plasmon resonance in semiconductors. The conditions requisite for FRET to occur are the close proximity between the components, and importantly the energy emission spectrum of the donor (CP in this case) must overlap with the absorption or excitation spectrum of the acceptor (CuS, in this instance) . The extent to which the donor–acceptor pairs overlap is termed the spectral overlap integral.…”

Section: Resultsmentioning

confidence: 99%

“…The conditions requisite for FRET to occur are the close proximity between the components, and importantly the energy emission spectrum of the donor (CP in this case) must overlap with the absorption or excitation spectrum of the acceptor (CuS, in this instance). 65 The extent to which the donor−acceptor pairs overlap is termed the spectral overlap integral. The excellent overlap between the emission spectrum of CP and the absorption spectrum of CuS, as shown in Figure 5d, supports that FRET is the primary mechanism of energy transfer, thereby enhancing the photothermal conversion in the CP/ CuS core−shell structure.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Enhanced Photothermal Effect Assisted by Resonance Energy Transfer in Carbon/Covellite Core–Shell Nanoparticles toward a High-Performance Interfacial Water Evaporation Process

Chhetri,

Nguyen,

Song

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Carbon and semiconductor nanoparticles are promising photothermal materials for various solar-driven applications. Inevitable recombination of photoinduced charge carriers in a single constituent, however, hinders the realization of a greater photothermal effect. Core−shell heterostructures utilizing the donor−acceptor pair concept with high-quality interfaces can inhibit energy loss from the radiation relaxation of excited species, thereby enhancing the photothermal effect. Here, core−shell structures composed of a covellite (CuS) shell (acceptor) and spherical carbon nanoparticle (CP) core (donor) (abbreviated as CP/CuS) are proposed to augment the photothermal conversion efficiency via the Forster resonance energy transfer (FRET) mechanism. The close proximity and spectral overlap of the donor and acceptor trigger the FRET mechanism, where the electronic excitation relaxation energy of the CP reinforces the plasmonic resonance and near-infrared absorption in CuS, resulting in boosting the overall photothermal conversion efficiency. CP/CuS core−shell coated on polyurethane (PU) foam exhibits a total solar absorption of 97.1%, leading to an elevation in surface temperature of 61.6 °C in dry conditions under simulated solar illumination at a power density of 1 kW m −2 (i.e., 1 sun). Leveraging the enhanced photothermal conversion emanated from the energy transfer effect in the core−shell structure, CP/CuS-coated PU foam achieves an evaporation rate of 1.62 kg m −2 h −1 and an energy efficiency of 93.8%. Thus, amplifying photothermal energy generation in core−shell structures via resonance energy transfer can be promising in solar energy-driven applications and thus merits further exploration.

show abstract

“…For example, metal ions can accept electrons to be reduced, thereby decreasing the NC fluorescence intensity [73]. Many organic compounds can act as electron acceptors in the Förster resonance energy transfer, which also decreases the NC fluorescence intensity or leads to the formation of an additional fluorescence peak [74]. This principle is often used for the detection of metal ions, the selectivity being ensured by functionalization of the NC surface with a ligand that selectively interacts with a specific ion, e.g., Fe 3+ [75], Cr 6+ [76], or Cu 2+ [77].…”

Section: Biosensors Based On Fluorescent Gelsmentioning

confidence: 99%

Biosensors Based on Inorganic Composite Fluorescent Hydrogels

et al. 2023

View full text Add to dashboard Cite

Fluorescent hydrogels are promising candidate materials for portable biosensors to be used in point-of-care diagnosis because (1) they have a greater capacity for binding organic molecules than immunochromatographic test systems, determined by the immobilization of affinity labels within the three-dimensional hydrogel structure; (2) fluorescent detection is more sensitive than the colorimetric detection of gold nanoparticles or stained latex microparticles; (3) the properties of the gel matrix can be finely tuned for better compatibility and detection of different analytes; and (4) hydrogel biosensors can be made to be reusable and suitable for studying dynamic processes in real time. Water-soluble fluorescent nanocrystals are widely used for in vitro and in vivo biological imaging due to their unique optical properties, and hydrogels based on these allow the preservation of these properties in bulk composite macrostructures. Here we review the techniques for obtaining analyte-sensitive fluorescent hydrogels based on nanocrystals, the main methods used for detecting the fluorescent signal changes, and the approaches to the formation of inorganic fluorescent hydrogels via sol–gel phase transition using surface ligands of the nanocrystals.

show abstract

Fluorescence Quenching by Förster Resonance Energy Transfer in Carbon–Cadmium Sulfide Core-Shell Quantum Dots

Cited by 7 publications

References 24 publications

Recyclable luminescent carbon dots nanopaper for flexible electronics

Recyclable luminescent carbon dots nanopaper for flexible electronics

Enhanced Photothermal Effect Assisted by Resonance Energy Transfer in Carbon/Covellite Core–Shell Nanoparticles toward a High-Performance Interfacial Water Evaporation Process

Biosensors Based on Inorganic Composite Fluorescent Hydrogels

Contact Info

Product

Resources

About