Construction of CdIn2S4/MXene‐TiO2 Z‐Scheme Heterojunction for High‐Gain Organic Photoelectrochemical Transistor to Achieve Maximized Transconductance at Zero Bias DOI Open Access
Haowei Zhang, Yunlei Zhou, Miao Zhang

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Abstract Interfacial charge‐carrier complexation is a bottleneck problem governing the gating effect of organic photoelectrochemical transistor (OPECT) biosensors. Therefore, it has long been desired to enhance OPECT and realize maximum transconductance at zero bias. In this study, an in situ engineered heterojunction nano‐enzymatic catalytic integration OPECT‐colorimetric dual‐mode sensing platform developed for dibutyl phthalate detection. Specifically, highly efficient photoactive CdIn 2 S 4 /MXene‐TiO Z‐scheme constructed by two‐step engineering promote effective separation electron–hole pairs achieve sensitive poly(ethylene dioxythiophene):poly(styrene sulfonate)‐based OPECT. Target‐induced rolling circle amplification used as signal unit, Ag@Carbon Sphere (Ag─CS) conditioning element, which on one hand causes shunting photogenerated electrons, leading energy transfer reduced gating. At same time, Ag─CS acts peroxidase‐mimicking nanozyme oxidize TMB discoloration. Importantly, prepared sensor exhibits good selectivity high sensitivity detection with limit 0.08 fM also shows superior ability real water bodies. provides ideal choice toxic molecule promising application environmental monitoring food analysis.

Language: Английский

Oxygen Activation Biocatalytic Precipitation Strategy Based on a Bimetallic Single-Atom Catalyst for Photoelectrochemical Biosensing DOI
Hongkun Li, Zhikang Li, Qianqian Cai

et al.

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

The traditional biocatalytic precipitation (BCP) strategy often required the participation of H2O2, but H2O2 had problem self-decomposition, which prevented its application in quantitative analysis. This work first found that a bimetallic single-atom catalyst (Co/Zn–N–C SAC) could effectively activate dissolved O2 to produce reactive oxygen species (ROS) due superior oxidase (OXD)-like activity. Experimental investigations demonstrated Co/Zn–N–C SAC preferred highly active hydroxyl radicals (•OH), oxidized 3-amino-9-ethyl carbazole (AEC) reddish-brown insoluble precipitates. Based on this property, unique oxygen-activated photoelectrochemical (PEC) biosensor was developed for chloramphenicol (CAP) detection. Cesium platinum bromide nanocrystals (Cs2PtBr6 NCs) were new type halide perovskite with lead-free, narrow band gaps, and water-oxygen resistance. Cs2PtBr6 NCs showed excellent cathodal PEC performance without an exogenous coreactant used As "proof-of-concept application", introduced onto surface by using CAP dual-aptamer sandwich strategy. activated ROS, AEC precipitates, quenching signal In summary, overcome restriction enzymatic BCP requiring improved stability accuracy analysis, also broadened range coreactant-free perovskite-type biosensors.

Language: Английский

Citations

2
Recent advances in foodborne pathogen detection using photoelectrochemical biosensors: from photoactive material to sensing strategy DOI Creative Commons
Xiuxiu Dong,

Ao Huang,

Lilong He

et al.

Frontiers in Sustainable Food Systems, Journal Year: 2024, Volume and Issue: 8

Published: Aug. 27, 2024

Rapid assessment and prevention of diseases caused by foodborne pathogens is one the existing food safety regulatory issues faced various countries, it has received wide attention from all sectors society. When content in higher than limit standard spreads a certain way, can cause disease outbreaks, which seriously threaten human health or life safety. Developing novel method to detect accurately rapidly significant. Because limitations complex steps, time-consuming, low sensitivity poor selectivity commonly used methods, photoelectrochemical (PEC) biosensor based on electrochemistry developed. Its advantages include background signal, fast response simple operation. It also broad application prospects for sensing, attracted attention. However, an organized summary latest PEC biosensors pathogen sensing not been reported. Therefore, this review introduces recent advances detection using as follows: (i) construction biosensors, (ii) research status (iii) direction future development field. Hopefully, study will provide some insight into developing more mature bio-sensing strategies meet practical needs surveillance.

Language: Английский

Citations

8
Flexible Ti3C2Tx MXene Regulated Photoelectrochemical Sensing Platform for Sensitive Monitoring of Dopamine DOI
Degang Jiang,

Xueying Cao,

Yantian Shi

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 6, 2024

Abstract Flexible photoelectrochemical (PEC) based sensors have been extensively investigated for noninvasive healthcare monitoring. However, known electrode materials struggle to combine technologically relevant metrics of high sensitivity and flexibility due their low electrical conductivity fragile mechanical properties. Herein, a flexible PEC‐based sensor dopamine (DA) detection is presented by integrating highly conductive MXene between CdS quantum dots g‐C 3 N 4 with suitable energy level matching. Theoretical calculations reveal that the interfaces constructed PEC electrodes enhanced electronic derived from not only improve electron transfer kinetics, but form built‐in electric fields at interfaces, facilitating separation efficiency electron–hole pairs. As result, as‐prepared display combined advantages wide range (1 nM–0.1 mM), limit (0.48 nM), stability, selectivity, repeatability DA detection. Building on these metrics, scalable screen‐printing method further developed platforms. These all‐integrated exhibit stable photocurrent signals under different bending angles cycles. Therefore, this work demonstrates development sensitive holds promise future

Language: Английский

Citations

7
High Entropy Layered Double Hydroxide Nanozyme for Sensitive Detection of Tetracycline DOI

Lupeng Dou,

Ke Xiao

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(5), P. 2456 - 2465

Published: Jan. 29, 2025

Monitoring and controlling antibiotic residues in the environment are critical for minimizing bacterial resistance, preserving microecological equilibrium, protecting human health. Core competencies of sensor include sensitivity, selectivity, mobility. It is still very difficult to combine these qualities a single effective tetracycline (TC) detection. Herein, flower-like spherical structure high-entropy layered double hydroxide Fe0.45Co0.45Ni0.45Cu0.45Zn0.45-LDH (HE-LDH) was prepared with superior peroxide-like activity convert hydrogen peroxide (H2O2) hydroxyl radicals (•OH) (Km = 0.075 mM H2O2). Because significant reactivity that exists between TC •OH produced catalytic system, simple colorimetric method detection established. As performance, linear range limit were 100–1000 25.6 nM solution mode, respectively. Also, 100–800 32.2 obtained paper mode. The developed also exhibited good selectivity over other antibiotics, amino acids, ions. Furthermore, use actual water sample analysis demonstrated excellent self-calibration satisfactory recovery 95.4–103.1%. This study offers progress toward developing nanozymes enzyme-like detection, accelerating development efficient portable sensors.

Language: Английский

Citations

0
Molecular chelating and shielding operation for organic photoelectrochemical transistor detection of chlorpyrifos DOI
Lin Lang, Yumei Li, Rui Ban

et al.

Analytica Chimica Acta, Journal Year: 2025, Volume and Issue: 1346, P. 343783 - 343783

Published: Feb. 7, 2025

Language: Английский

Citations

0
Aptamer-Induced Spatially Confined Electron Donors Enable Bi2S3/ZnIn2S4 Heterostructures for Attomolar Photoelectrochemical Detection of Antibiotic Resistance Genes DOI

Ruonan Qiao,

Fu Zhou,

Yinbo Ban

et al.

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Despite the fact that exploration of novel materials with excellent photoelectrochemical (PEC) performance is sought-after objective for its detection low abundance targets, introduction electron donors in a rational and efficient manner to further boost PEC signals still desirable. In this work, highly Bi2S3/ZnIn2S4 (BZ) heterojunctions were synthesized, strategy aptamer-induced spatially confined (ASED) was, first time, proposed enhanced stable photocurrent generation. With dopamine (DA) or ascorbic acid (AA) as donor model, ∼ 22-fold signal enhancement could be obtained system using ASED strategy. Furthermore, we established newly updated biosensor antibiotic resistance genes based on BZ by ingeniously incorporating catalytic hairpin assembly (CHA) DNAzyme cleavage reaction. It was demonstrated our exhibited an outstanding linear response concentration variations from 0.1 fM 1.0 nM achieved limit 3.24 aM, without need additional donors. This significantly enhances analytical situ aptamer-promoted toward simple, efficient, biosensors, which may shed light biorecognition smart biosensing broad applications.

Language: Английский

Citations

0
Graphene Photoelectrochemical Transistor for Dual‐Directional Signal‐on Biosensing DOI
Chengshuang Wang, Yue Jiang, Zheng Li

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Abstract Recent research has demonstrated the potential of photogating in regulating characteristics photoelectrochemical transistors. Here it is reported graphene transistor (GPECT) with dual‐directional signal‐on biosensing as exemplified by channel gated p/n‐type metal–organic frameworks (MOFs) upon light illumination toward aptasensing. Due to shift Dirac point induced MOFs, operation mutually verifiable dual readout could be achieved. For aptasensing, assistance biocatalytic precipitation reaction, such a device validated for highly sensitive detection thrombin limits low 5.2 and 0.1 f m , respectively. This study demonstrates not only general protocol GPECTs but also unique novel optoelectronics.

Language: Английский

Citations

0
Combinatorial Neoadjuvant and Photoinduced Adoptive Cellular Immunotherapy via MXene Nanosphere DOI

Ammavasi Chandran Ambigaibalan,

Sivaraj Mehnath,

Priya Dharshini Krishnan

et al.

ACS Applied Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Language: Английский

Citations

0
Dual-mode photoelectrochemical/colorimetric sensor for CTCs detection based on seaurchin-like LaNiCo/Pd nanozymes and Exo-DNAzyme cascade program DOI
Wen‐Chao Geng,

Linsheng Xue,

Zhiyi Yan

et al.

Sensors and Actuators B Chemical, Journal Year: 2025, Volume and Issue: unknown, P. 137837 - 137837

Published: April 1, 2025

Language: Английский

Citations

0
Recent advances in photoelectrochemical detection of hydrogen sulfide DOI Creative Commons
Fang Chen, Xiuhua Wei, Yuanqiang Hao

et al.

International Journal of Electrochemical Science, Journal Year: 2025, Volume and Issue: unknown, P. 101046 - 101046

Published: April 1, 2025

Language: Английский

Citations

0