Li³⁺ ion beam irradiation persuaded enhancement in the thermodynamic parameters of a hydrogen-bonded liquid crystalline material

Abstract

Effect of $L{i}^{3+}$ ion beam irradiation has been investigated in the thermodynamic parameters of a hydrogen-bonded liquid-crystalline material $4-n(nonyloxy)benzoicacid(9OBA)$ by differential scanning calorimetry. Thermodynamic data suggest that the phase transition temperatures are decreased for a low fluence of irradiation and thereafter increase with the increase in irradiation fluence. The average transition enthalpies and entropies are increased for a low fluence of irradiation and are decreased for higher fluences of irradiation.

KEYWORDS:

• ion beam irradiation
• thermodynamic parameters
• achiral liquid crystal

Acknowledgments

One of us (RD) thanks financial support under the FIST program by the Department of Science and Technology (DST), Government of India.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by FIST program by the Department of Science and Technology (DST): [Grant Number ].

Notes on contributors

Satendra Kumar

Satendra kumar is currently working as a Ph.D. scholar in the Department of Physics, Amity Institute of Applied Sciences, Amity University Uttar Pradesh, Noida, India. He did post-M.Sc. Diploma in Radiological Physics from Bhabha Atomic Research Centre, Mumbai, Maharashtra, India in 2010-2011, and obtained an M.Sc. degree in Physics from CSJM University, Kanpur, Uttar Pradesh, India in 2008. His research interests include Dielectric Spectroscopy, UV-Visible Spectroscopy, Thermodynamics, Radiation Dosimetry, and Radiation Therapy Treatment Planning. He has presented papers at national and international conferences.

Rohit Verma

Dr Rohit Verma is an assistant professor in the Department of Physics, Amity Institute of Applied Sciences, Amity University Uttar Pradesh, Noida, India. His research focuses on Dielectric Spectroscopy, Infrared Spectroscopy, UV-Visible Spectroscopy, Thermodynamics, Condensed Matter Physics, Material Characterization, Nanomaterials Synthesis, Ferroelectrics, X-ray Diffraction, Phase Transitions, etc. He has published more than 35 research articles in international peer-reviewed journals.

Anil Kumar Bansal

Dr Anil Kumar Bansal is a consultant Radiation Physicist in the Department of Radiation Oncology, Max Super Specialty Hospital, New Delhi, India. He is an expert in Radiation Dosimetry, Radiation Therapy Treatment Planning, and Condensed Matter Physics. He has published many research articles in international peer-reviewed journals.

Ambuj Tripathi

Dr Ambuj Tripathi is a Senior Scientist (H) in Material Science Division, Inter-University Accelerator Centre (IUAC), New Delhi, India. He is the Programme Leader of the Materials Science Group. He has played a key role in setting up materials science beamline and many in-situ/on-line facilities including in-situ STM, on-line ERDA and in-situ XRD facilities. His areas of research are Ion beam induced modification of carbon based 2-D materials and nanostructures, Ion beam induced modification of surfaces and interfaces, Synthesis and characterization of nanostructures.

Ravindra Dhar

Dr Ravindra Dhar is Professor and Coordinator of Centre of Materials Science, University of Allahabad, Prayagraj, India. His research focuses on Dielectric Spectroscopy, Infrared Spectroscopy, UV-Visible Spectroscopy, Thermodynamics, Condensed Matter Physics, Material Characterization, Nanomaterials Synthesis, Ferroelectrics, X-ray Diffraction, Thin Films and Nanotechnology, Electrical Dielectric Materials, SEM Analysis, Ceramic Materials, Sol-Gel Synthesis, Phase Transitions, etc. He has published more than 220 research articles in international peer-reviewed journals. He is a member of several international conference committees.