Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensor...

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Autores principales:	Andrew Kim, Imre Varga, Arindam Adhikari, Rajkumar Patel
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	LDH electrochemical sensors optical sensors reduced graphene oxide Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/cedc93ed16a54586b8734a764dc13890
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spelling	oai:doaj.org-article:cedc93ed16a54586b8734a764dc138902021-11-25T18:29:58ZRecent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors10.3390/nano111128092079-4991https://doaj.org/article/cedc93ed16a54586b8734a764dc138902021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2809https://doaj.org/toc/2079-4991Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensors are affordable alternatives to traditional precious-metal-based sensors, as LDHs can be synthesized from abundant inorganic precursors. LDH-modified probes can directly catalyze or host catalytic compounds that facilitate analyte redox reactions, detected as changes in the probe’s current, voltage, or resistance. The porous and lamellar structure of LDHs allows rapid analyte diffusion and abundant active sites for enhanced sensor sensitivity. LDHs can be composed of conductive materials such as reduced graphene oxide (rGO) or metal nanoparticles for improved catalytic activity and analyte selectivity. As optical sensors, LDHs provide a spacious, stable structure for synergistic guest–host interactions. LDHs can immobilize fluorophores, chemiluminescence reactants, and other spectroscopically active materials to reduce the aggregation and dissolution of the embedded sensor molecules, yielding enhanced optical responses and increased probe reusability. This review discusses standard LDH synthesis methods and overviews the different electrochemical and optical analysis techniques. Furthermore, the designs and modifications of exemplary LDHs and LDH composite materials are analyzed, focusing on the analytical performance of LDH-based sensors for key biomarkers and pollutants, including glucose, dopamine (DA), H<sub>2</sub>O<sub>2</sub>, metal ions, nitrogen-based toxins, and other organic compounds.Andrew KimImre VargaArindam AdhikariRajkumar PatelMDPI AGarticleLDHelectrochemical sensorsoptical sensorsreduced graphene oxideChemistryQD1-999ENNanomaterials, Vol 11, Iss 2809, p 2809 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	LDH electrochemical sensors optical sensors reduced graphene oxide Chemistry QD1-999
spellingShingle	LDH electrochemical sensors optical sensors reduced graphene oxide Chemistry QD1-999 Andrew Kim Imre Varga Arindam Adhikari Rajkumar Patel Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors
description	Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensors are affordable alternatives to traditional precious-metal-based sensors, as LDHs can be synthesized from abundant inorganic precursors. LDH-modified probes can directly catalyze or host catalytic compounds that facilitate analyte redox reactions, detected as changes in the probe’s current, voltage, or resistance. The porous and lamellar structure of LDHs allows rapid analyte diffusion and abundant active sites for enhanced sensor sensitivity. LDHs can be composed of conductive materials such as reduced graphene oxide (rGO) or metal nanoparticles for improved catalytic activity and analyte selectivity. As optical sensors, LDHs provide a spacious, stable structure for synergistic guest–host interactions. LDHs can immobilize fluorophores, chemiluminescence reactants, and other spectroscopically active materials to reduce the aggregation and dissolution of the embedded sensor molecules, yielding enhanced optical responses and increased probe reusability. This review discusses standard LDH synthesis methods and overviews the different electrochemical and optical analysis techniques. Furthermore, the designs and modifications of exemplary LDHs and LDH composite materials are analyzed, focusing on the analytical performance of LDH-based sensors for key biomarkers and pollutants, including glucose, dopamine (DA), H<sub>2</sub>O<sub>2</sub>, metal ions, nitrogen-based toxins, and other organic compounds.
format	article
author	Andrew Kim Imre Varga Arindam Adhikari Rajkumar Patel
author_facet	Andrew Kim Imre Varga Arindam Adhikari Rajkumar Patel
author_sort	Andrew Kim
title	Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors
title_short	Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors
title_full	Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors
title_fullStr	Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors
title_full_unstemmed	Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors
title_sort	recent advances in layered double hydroxide-based electrochemical and optical sensors
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/cedc93ed16a54586b8734a764dc13890
work_keys_str_mv	AT andrewkim recentadvancesinlayereddoublehydroxidebasedelectrochemicalandopticalsensors AT imrevarga recentadvancesinlayereddoublehydroxidebasedelectrochemicalandopticalsensors AT arindamadhikari recentadvancesinlayereddoublehydroxidebasedelectrochemicalandopticalsensors AT rajkumarpatel recentadvancesinlayereddoublehydroxidebasedelectrochemicalandopticalsensors
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Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

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