Charge and Energy Transfer Between CdSe Quantum Dots and Polyaniline

Xu, Liang; Huang, Xingbin; Dai, Wei; Sun, Punan; Chen, Xuanlin; An, Li

doi:10.1166/jnn.2016.11851

Cited by 3 publications

(2 citation statements)

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“…The schematic is shown in Figure C; the photoluminescence of QDs was caused by the radiative recombination of electron–hole (exciton) upon light excitation. According to the Eschweiler–Clarke reaction (reversible), primary and secondary amines are easily N -methylated by a mixture of paraformaldehyde leading to good bonding of formaldehyde molecules with amino groups modified on the surface of QDs after the injection of gaseous formaldehyde. , After the photoexcitation of QDs, the carbonyl groups in formaldehyde molecules close to the surface of QDs act as electron acceptors. Then, the excited electron on the conduction band of QDs will transfer to the carbonyl of formaldehyde molecules.…”

Section: Resultsmentioning

confidence: 99%

“…According to the Eschweiler−Clarke reaction (reversible), primary and secondary amines are easily N-methylated by a mixture of paraformaldehyde leading to good bonding of formaldehyde molecules with amino groups modified on the surface of QDs after the injection of gaseous formaldehyde. 44,45 After the photoexcitation of QDs, the carbonyl groups in formaldehyde molecules close to the surface of QDs act as electron acceptors.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Surface Plasmon-Enhanced Optical Formaldehyde Sensor Based on CdSe@ZnS Quantum Dots

et al. 2020

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For the first time, a reproducible surface plasmonenhanced optical sensor for the detection of gaseous formaldehyde was proposed, which was fabricated by depositing a mixture of CdSe@ZnS quantum dots (QDs), fumed silica (FS), and gold nanoparticles (GNs) on the surface of a silica sphere array to meet the urgent requirement of a rapid, sensitive, and highly convenient formaldehyde detection method. Because of the spectral overlap between QDs and GNs, plasmon-enhanced fluorescence was observed in the film of QDs/FS/GNs. When exposed to formaldehyde molecules, the enhanced fluorescence was quenched linearly with the increase of formaldehyde concentration in the range of 0.5−2.0 ppm. The reason is attributed to the nonradiative electron transfer from QDs to the carbonyl of formaldehyde molecules with the assistance of amino groups. Our results demonstrate that the designed sensors are capable of detecting ultralow concentration gaseous formaldehyde at room temperature with a fast response− recovery time and excellent selectivity, stability, and reproducibility. This work provides a simple and low-cost approach for optical formaldehyde sensor fabrication and shows promising applications in environmental detection.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Surface Plasmon-Enhanced Optical Formaldehyde Sensor Based on CdSe@ZnS Quantum Dots

et al. 2020

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Polyaniline salt containing dual dopants, pyrelenediimide tetracarboxylic acid, and sulfuric acid: Fluorescence and supercapacitor

Gottam

Bhosale

Palaniappan

2017

J of Applied Polymer Sci

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Storage of energy is considered as the most germane technologies to address the future sustainability. In this study, aniline was chemically oxidized with a controlled concentration of pyrelenediimide tetracarboxylic acid (PDITCA) by ammonium persulfate to polyaniline salt (PANI‐H2SO4‐PDITCA), with nanorods morphologies, having a sensibly decent conductivity of 0.8 S cm−1, wherein H2SO4 was generated from ammonium persulfate during polymerization. PANI‐H2SO4‐PDITCA salt showed bathochromic fluorescence shift (595 nm) compared to PDITCA (546 nm). The Brunauer–Emmett–Teller surface area of the PANI‐H2SO4‐PDITCA‐25 and PANI‐H2SO4‐PDITCA‐50 were 18.3 and 21.4 m2 g−1, respectively. Furthermore, its energy storage efficiency was evaluated by supercapacitor cell configuration. The composite PANI‐H2SO4‐PDITCA‐50 showed capacitance 460 F g−1 at 0.3 A g−1 and large cycle life 85,000 cycles with less retention of 77% to its original capacitance (200 F g−1) even at a better discharge rate of 3.3 A g−1. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45456.

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Energy Transfer from CdSe/ZnS Nanocrystals to Tetraphenyl Porphyrin

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Charge and Energy Transfer Between CdSe Quantum Dots and Polyaniline

Cited by 3 publications

References 0 publications

Surface Plasmon-Enhanced Optical Formaldehyde Sensor Based on CdSe@ZnS Quantum Dots

Surface Plasmon-Enhanced Optical Formaldehyde Sensor Based on CdSe@ZnS Quantum Dots

Polyaniline salt containing dual dopants, pyrelenediimide tetracarboxylic acid, and sulfuric acid: Fluorescence and supercapacitor

Energy Transfer from CdSe/ZnS Nanocrystals to Tetraphenyl Porphyrin

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