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Exfoliating a Cd II –Purine Framework: Conversion of Nanosheets‐to‐Nanofibers and Studies of Elastic and Capacitive Properties
Author(s) -
Avasthi Ilesha,
Kulkarni Manish M.,
Verma Sandeep
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201900541
Subject(s) - exfoliation joint , materials science , raman spectroscopy , nanotechnology , kelvin probe force microscope , crystal (programming language) , single crystal , nanofiber , intercalation (chemistry) , graphene , crystallography , chemical engineering , atomic force microscopy , chemistry , inorganic chemistry , optics , physics , engineering , computer science , programming language
Layered bulk crystals are amenable to exfoliation to yield 2D nanosheets through isolation and intercalation processes, which could be further converted to 1D nanoscale structures. The latter inherit gross morphological and physical properties associated with the precursor structures. Herein, we report three purine‐based crystal structures 1 , 2 , and 3 , where 3 is obtained by a single‐crystal‐to‐single‐crystal transformation from 2 and is a conformational polymorph of 1 . Next, we describe the sonication‐assisted liquid exfoliation of 1 , a Cd II –purine coordination framework, into nanosheets and nanofibers in a solvent‐dependent process. The exfoliation was carefully studied at low temperatures to ascertain this unique conversion. This work also features the determination of the Young's modulus and surface potential of the bioinspired Cd II ‐based nanostructures by using amplitude modulation–frequency modulation atomic force microscopy and Kelvin probe force microscopy, respectively, revealing their interesting elastic and capacitive properties for their possible use in electronics and energy devices. Electron impedance spectroscopy measurements further established a higher value of capacitance for the exfoliated Cd II framework as compared to the ligand alone.