2D materials; Chemical modification; Dielectric; Electrochemical detection; Siloxene; 2d material; Benzyl group; Characterization studies; Dielectric studies; ELectrochemical detection; Electrochemical studies; Electronics devices; Functionalized; Miniaturisation; Electronic, Optical and Magnetic Materials
Abstract :
[en] Silicon is one of the most used materials in semiconductors and electronic devices. Its miniaturization in two-dimensional (2D) scale is now a great challenge to improve and/or extend its application in many practical fields. Layered siloxene nanosheet (SiNS), a derived 2D silicon material with –H and –OH functional groups synthesized from calcium di-silicide (CaSi2) have attracted a great interest while its functionalization has been barely explored. Herein, the strategy of direct exfoliation of CaSi2 by thermal heating with benzyl groups was explored, leading to air stable functionalized silicon nanosheets. The obtained dispersible thin materials were found to be mostly Kautsky-type crystalline siloxene nanosheets that are arbitrarily terminated with benzyl, hydrogen and hydroxyl groups. Moreover, the dielectric study with temperature dependency showed high dielectric permittivities, without any conducting polymer, induced by different phenomena occurring on the layered nanosheets. Electrochemical studies displayed a diffusion-controlled process involving a fast electron transfer with the functionalized silicon-based materials as working electrodes deposited on carbon graphite electrode (CGE) in the presence of ferricyanide ions. Organo-modified siloxene are therefore potential electrode materials for electrochemical detection.
Disciplines :
Chemistry
Author, co-author :
Nayad, Abdallah; Laboratoire de Chimie Moléculaire, Unité de Chimie de Coordination Et Catalyse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Hasnaoui, Ali; Laboratoire de Chimie Moléculaire, Unité de Chimie de Coordination Et Catalyse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Hadouch, Youness; Laboratory of Innovative Materials, Energy and Sustainable Development (IMED), Faculté Des Sciences Et Techniques, Université Cadi Ayyad, Marrakech, Morocco
Fkhar, Lahcen ; Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM) ; Laboratoire de Chimie Moléculaire, Unité de Chimie de Coordination Et Catalyse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Idouhli, Rachid; Laboratoire de Chimie Appliquée Et Biomasse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Abdessalam, Abouelfida; Laboratoire de Chimie Appliquée Et Biomasse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Mehdi, Ahmad; Institut Charles Gerhardt Montpellier, Université Montpellier, CNRS, ENSCM, Montpellier, France
Dikici, Burak; Department of Metallurgical and Materials Engineering, Atatürk University, Erzurum, Turkey
Mezzane, Daoud; Laboratory of Innovative Materials, Energy and Sustainable Development (IMED), Faculté Des Sciences Et Techniques, Université Cadi Ayyad, Marrakech, Morocco
Firdoussi, Larbi El; Laboratoire de Chimie Moléculaire, Unité de Chimie de Coordination Et Catalyse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Ait Ali, Mustapha ; Laboratoire de Chimie Moléculaire, Unité de Chimie de Coordination Et Catalyse, Faculté Des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco
Language :
English
Title :
Chemical Synthesis of Organo-siloxene 2D Materials from Calcium Di-Silicide: Characterization, Dielectric and Electrochemical Studies
The authors would like to thank first Pr. Kacim Salah and Dr. Anass Benayad for the help in XPS discussion, and secondly the technical staff of the CAC (Centre of Analysis and Characterization) of Cadi Ayyad University for running SEM-EDS, FT-IR and XRD analyses.
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