The nonlinear absorption effects and optical limiting properties of Bi2Te3/rGO thin films

Dopamine is a neurotransmitter that helps cells to transmit pulsed chemicals. Therefore, dopamine detection is crucial from the viewpoint of human health. Dopamine determination is typically achieved via chromatography, fluorescence, electrochemiluminescence, colorimetry, and enzyme-linked methods. However, most of these methods employ specific biological enzymes or involve complex detection processes. Therefore, non-enzymatic electrochemical sensors are attracting attention owing to their high sensitivity, speed, and simplicity. In this study, a simple one-step fabrication of a Bi2Te3-nanosheet/reduced-graphene-oxide (BT/rGO) nanocomposite was achieved using a hydrothermal method to modify electrodes for electrochemical dopamine detection. The combination of the BT nanosheets with the rGO surface was investigated by X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. Electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry were performed to analyze the electrochemical-dopamine-detection characteristics of the BT/rGO nanocomposite. The BT/rGO-modified electrode exhibited higher catalytic activity for electrocatalytic oxidation of 100 µM dopamine (94.91 µA, 0.24 V) than that of the BT-modified (4.55 µA, 0.26 V), rGO-modified (13.24 µA, 0.23 V), and bare glassy carbon electrode (2.86 µA, 0.35 V); this was attributed to the synergistic effect of the electron transfer promoted by the highly conductive rGO and the large specific surface area/high charge-carrier mobility of the two-dimensional BT nanosheets. The BT/rGO-modified electrode showed a detection limit of 0.06 µM for dopamine in a linear range of 10–1000 µM. Additionally, it exhibited satisfactory reproducibility, stability, selectivity, and acceptable recovery in real samples.

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“…01-082-0358) [40]. No peaks of rGO appeared owing to its low weight fraction, which is consistent with previously reported data [41,42].…”

Section: Characterization Of Bt/rgosupporting

confidence: 91%

In Situ Synthesis of a Bi2Te3-Nanosheet/Reduced-Graphene-Oxide Nanocomposite for Non-Enzymatic Electrochemical Dopamine Sensing

et al. 2022

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“…3 The nonlinear optical (NLO) properties of the materials determined the performance of the OL material, such as nonlinear scattering, nonlinear refraction (NLR), and nonlinear absorption (NLA) [i.g., reserve saturable absorption (RSA) and two-photon absorption (2PA)]. 4 In recent years, halide perovskite described by MAPbX 3 (MA = CH 3 NH 3 , X = Br, I, and Cl) has been considered an important candidate NLO material. 5,6 Because the band gap of the halide perovskite is tunable, the exciton binding energy is suitable, and the oscillator strength is strong, the NLO properties of the halide perovskite have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

“…Excellent optical limiters require high-performance OL materials to meet the characteristics of large on-state transmission and damage threshold, as well as fast response . The nonlinear optical (NLO) properties of the materials determined the performance of the OL material, such as nonlinear scattering, nonlinear refraction (NLR), and nonlinear absorption (NLA) [i.g., reserve saturable absorption (RSA) and two-photon absorption (2PA)] …”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical and Optical Limiting Properties of MAPbBr₃/Polymethyl Methacrylate Organic Glasses

et al. 2022

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The MAPbBr 3 perovskite was synthesized, and X-ray diffraction proves that the MAPbBr 3 perovskite is a single crystal. MAPbBr 3 /polymethyl methacrylate (PMMA) organic glasses were fabricated. The MAPbBr 3 single crystal shows strong UV−visible absorption and weak transmittance. Compared with the MAPbBr 3 single crystal, MAPbBr 3 / PMMA organic glasses show suitable UV−visible absorption and transmittance and enhanced UV−visible absorption stability. The nonlinear optical measurement of MAPbBr 3 /PMMA was performed. An obviously reverse saturable absorption is observed. The nonlinear absorption coefficient is as high as 3.8 m/GW. This large nonlinear absorption coefficient is competitive compared with that of perovskite materials. Besides, the nonlinear absorption stability of MAPbBr 3 /PMMA is also studied. Both the UV−visible absorption and nonlinear absorption over time prove the excellent stability of MAPbBr 3 /PMMA. The superior nonlinear refraction property of MAPbBr 3 /PMMA is also performed. The excellent reverse saturable absorption property and the nonlinear refraction property of MAPbBr 3 /PMMA result in superior optical limiting characteristics. This work implied that MAPbBr 3 /PMMA may be applied for future optical limiting devices.

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“…For the pure Bi 2 Te 3 , one pair of peaks located at 571.6 and 582.0 eV belong to Te 2À , while the other pair of relatively high-intensity peaks at 575.5 and 585.9 eV are indexed to the oxide state of Te (Te 4+ ) due to the surface oxidation. 15 For Pd/ Bi 2 Te 3 , due to the surface coverage of the deposited Pd NPs, the peak profile is changed where the peaks of Te 2are nearly not observed, while the strong oxidation peaks of Te 4+ are found due to the surface oxidation (Table S1, ESI †). Similar results are also found in the narrow spectrum of Bi 4f (Fig.…”

mentioning

confidence: 99%

Bi₂Te₃ nanosheets promoted Pd for ethylene glycol electrooxidation both in the dark and under visible light irradiation

Ren,

Fei,

Yang

et al. 2024

Chem. Commun.

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The nonlinear absorption effects and optical limiting properties of Bi2Te3/rGO thin films

Cited by 15 publications

References 58 publications

In Situ Synthesis of a Bi2Te3-Nanosheet/Reduced-Graphene-Oxide Nanocomposite for Non-Enzymatic Electrochemical Dopamine Sensing

In Situ Synthesis of a Bi2Te3-Nanosheet/Reduced-Graphene-Oxide Nanocomposite for Non-Enzymatic Electrochemical Dopamine Sensing

Nonlinear Optical and Optical Limiting Properties of MAPbBr₃/Polymethyl Methacrylate Organic Glasses

Bi₂Te₃ nanosheets promoted Pd for ethylene glycol electrooxidation both in the dark and under visible light irradiation

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The nonlinear absorption effects and optical limiting properties of Bi2Te3/rGO thin films

Cited by 15 publications

References 58 publications

In Situ Synthesis of a Bi2Te3-Nanosheet/Reduced-Graphene-Oxide Nanocomposite for Non-Enzymatic Electrochemical Dopamine Sensing

In Situ Synthesis of a Bi2Te3-Nanosheet/Reduced-Graphene-Oxide Nanocomposite for Non-Enzymatic Electrochemical Dopamine Sensing

Nonlinear Optical and Optical Limiting Properties of MAPbBr3/Polymethyl Methacrylate Organic Glasses

Bi2Te3 nanosheets promoted Pd for ethylene glycol electrooxidation both in the dark and under visible light irradiation

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Product

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Nonlinear Optical and Optical Limiting Properties of MAPbBr₃/Polymethyl Methacrylate Organic Glasses

Bi₂Te₃ nanosheets promoted Pd for ethylene glycol electrooxidation both in the dark and under visible light irradiation