Article
Chemistry, Physical
S. J. Shivaraja, R. K. Gupta, V Manjuladevi
Summary: Polymer dispersed liquid crystals (PDLCs) containing ODA-SWCNT dispersions were prepared and their electro-optical properties were studied. Compared to pure PDLCs, the PDLCs with ODA-SWCNT dispersions showed a shorter response time, lower threshold voltage, higher optical transparency, and better image sharpness in the ON-state.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Asim Debnath, Pradip Kumar Mandal
Summary: Doping of single and multi-walled carbon nanotubes (CNTs) significantly influences the dielectric and electro-optical properties of a room temperature FLC mixture. However, the comparative change between the two types of CNT doped systems is marginal. The dispersion of CNTs does not alter molecular ordering significantly, leading to a decrease in spontaneous polarization. Trapping of ions by CNTs results in remarkable decrease in dielectric increments and absorption strengths, as well as reduced ac/dc conductivities and local electric field, ultimately speeding up the switching time for FLC-based applications.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Junfeng Chen, Laixing Yan, Siyan Liang, Xiping Cui, Chaonong Liu, Bingshu Wang, Linchi Zou
Summary: This paper proposed a novel fabrication process of CNTs/Al composites with Cu nanoparticles decorated CNTs, which results in the remarkable improvement of strength and ductility of CNTs/Al composites. The in-depth study reveals that Cu nanoparticles repair CNTs structural defects and improve the interface wettability between Al and CNTs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Materials Science, Multidisciplinary
Deepak Rajaram Patil, Dae-Yong Jeong, Shuxiang Dong, Jungho Ryu
Summary: Magnetoelectric (ME) composites exhibit strong ME interfacial coupling due to the interaction between piezoelectricity and magnetostriction. They are ideal candidates for multifunctional devices such as energy harvesters, magnetic field sensors, ME random access memories, and ME antennas. The ME coupling in these composites depends on the superior physical properties of the piezoelectric and magnetostrictive materials. Recent studies have focused on relaxor-PT single crystal-based ME composites, which have shown excellent ME coupling and achieved high performance in terms of ME voltage coefficient, magnetic noise, and output power.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Ye Wang, Ya-Nan Gao, Tian-Ning Yue, Xu-Dong Chen, Ming Wang
Summary: In this study, multi-walled carbon nanotube-filled polydimethylsiloxane (CNT/PDMS) composites with high-performance and tunable microwave shielding were prepared by incorporating liquid metals (LMs). The composites exhibited high absorption loss and low reflection loss, effectively reducing secondary microwave pollution. The microwave shielding performance of the composites containing LMs could be regulated by compression.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Sami-ullah Rather
Summary: This study found that the hydrogen storage capacity of purified MWCNTs was significantly enhanced by incorporating Ti catalyst, with longer exposure of Ti to the MWCNTs leading to further improvement in hydrogen storage capacity. The interfacial diffusion of hydrogen and the presence of a higher amount of Ti on the MWCNTs were identified as key factors contributing to the enhanced hydrogen uptake.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Crystallography
Zheng Ma, Yanzi Gao, Hui Cao
Summary: In this study, researchers chemically modified multi-walled carbon nanotubes (MWNTs) to improve their dispersion in liquid crystal solutions, and used these modified MWNTs to fabricate twisted nematic liquid crystal cells. The introduction of MWNT derivatives affected the alignment of LC molecules, leading to a slight change in contrast ratio and a significant decrease in drive voltage, thus improving the drive ability of the twisted nematic liquid crystal display (TN-LCD) mode.
Article
Chemistry, Multidisciplinary
Zhibo Sun, Zhengnan Yuan, Runxiao Shi, Hoi-Sing Kwok, Abhishek Kumar Srivastava
Summary: Traditional liquid crystal displays suffer from serious fringe field effect (FFE), but deformed helix ferroelectric liquid crystals (DHFLCs) with subwavelength pitch can suppress FFE effectively, thus supporting the development of high-pixel density displays and photonic devices.
Article
Materials Science, Multidisciplinary
Chao Fan, Haipeng Liu, Jianwu Zhou, Xingliang Dai, Haiping He, Zhizhen Ye
Summary: The PLQY and overall stabilities of inorganic perovskite (CsPbBr3) NCs are improved by dual-matrix encapsulation. The resulting CsPbBr3@Cs4PbBr6/MS composites maintain more than 80% of their initial PL intensities after being aged for 1000 h under synergistic humidity-heat-light conditions. This dual-matrix encapsulation holds promising potential for industrial mass production.
Article
Engineering, Manufacturing
Verena Wulf, Ada Pui-yan Hung, Adi Hendler-Neumark, Weibai Li, Olga Shamis, Michael Gozin, Xiaodong Huang, Alan Kin Tak Lau, Gili Bisker
Summary: Noise pollution poses a threat to health and well-being, and its prevalence has been increasing. Incorporating fluorescent single-walled carbon nanotubes (SWCNTs) into epoxy resins can improve their sound-dampening capabilities. The DNA-SWCNT/epoxy composites showed the highest transmission loss, with an 18% improvement compared to epoxy alone, and the optimal concentration of DNA-SWCNT was found to be 2 mg L-1. Additionally, the near-infrared fluorescence of SWCNTs was utilized to characterize their distribution within the epoxy resin.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Xiuxiu Nie, Xinxin Li, Yueting Huang, Jiatao Wu, Fan Yang, Fei Zhong, Hong Xin, Chunmei Gao, Lei Wang
Summary: The study demonstrated that the introduction of E7 eutectic nematic mixture can significantly improve the thermoelectric performance of SWCNT composite materials, including increasing the Seebeck coefficient and power factor. Furthermore, after doped with triethylamine, SWCNT/E7 composites can convert from p-type to n-type.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Mohammadjavad Eslamian, Fereshtehsadat Mirab, Vijay Krishna Raghunathan, Sheereen Majd, Mohammad Reza Abidian
Summary: Electrochemical actuators made from organic semiconductors demonstrate high performance with fast ion transport and accumulation capability. These devices have low power consumption, large deformation, fast response, and excellent actuation stability, making them suitable for various applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Analytical
Saddam Weheabby, Zhenyn Wu, Ammar Al -Hamry, Igor A. Pasti, Adiraju Anurag, Doreen Dentel, Christoph Tegenkamp, Olfa Kanoun
Summary: This study demonstrates the voltammetric sensing of paracetamol using silver nanoparticles and carboxylated multi-walled carbon nanotubes on a screen-printed carbon electrode. The sensor shows effective sensing potential with a low detection limit under optimal conditions. Experimental and computational studies were conducted to support the findings. The proposed method shows promising applications for determining paracetamol in environmental and pharmaceutical samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Physics, Applied
Sabeen Fatima, Rabia Tahir, Syed Rizwan
Summary: This study presents a novel MXene flexible memory device with substrate-free growth in ambient conditions, which has attracted interest in current innovation due to its high nonvolatile storage, light weight, smart, portable, and better functioned memories. The synthesis of MXene sheets was confirmed through surface morphology, elemental and structural analysis. X-ray diffraction, Raman, and FTIR spectra showed the presence of TiO2 inside FE-Ti3C2Tx MXene, which contributed toward the ferroelectric behavior of MXene.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Xin Xie, Wenjuan Du, Zhenglong Shao, Yingjie Zhou, Zhilang Lou, Ruonan Ji, Dandan Wen, Bingyan Wei, Xuetao Gan, Jianlin Zhao, Fan Fan, Dongliang Tang
Summary: Planar liquid crystal (LC) optics has made progress in achieving multifunctional and integrated light manipulation through the proposal of several LC elements. The designs include gray-image multiplexing for independent binary gray images and manipulation of amplitude and phase for the integration of a holographic image, resulting in a tri-channel display. The proposed strategy also demonstrates the electrical tunability of the LC molecule for image control.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Akash Kumar, Depanshu Varshney, Jai Prakash
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Chemistry, Physical
Depanshu Varshney, Ariba Parveen, Jai Prakash
Summary: In this study, the influence of newly synthesized cobalt oxide nanoparticles on the dielectric and optical properties of liquid crystal materials was investigated. Dielectric spectroscopic measurements and optical microscopy were used to study the dielectric parameters and alignment of the liquid crystal material in the presence of the nanoparticles. The doping of these nanoparticles has significant potential for research and industrial applications.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Depanshu Varshney, Akash Kumar, Jai Prakash, Ramcharan Meena, K. Asokan
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Chemistry, Physical
Sidra Khan, Jai Prakash, Shikha Chauhan, Amit Choudhary, Ashok M. Biradar
Summary: Dielectric spectroscopy is used to investigate the behavior of bulk mode and surface phenomenon in surface stabilized liquid crystal samples. The study reveals the significant influence of surface effect on the characteristics of GM phenomenon, as well as the presence of two molecular dynamics and mode transitions at different temperatures.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Depanshu Varshney, Anu, Jai Prakash, Vinay Pratap Singh, Kamlesh Yadav, Gautam Singh
Summary: This study reports on the concentration and temperature dependent optical, electro-optical, and dielectric properties of a bismuth titanate nanocomposite doped with a nematic liquid crystal. The results show that the nanocomposite is uniformly dispersed in the liquid crystal without agglomeration, and it significantly affects the dielectric properties and optical memory of the liquid crystal. These findings have important implications for the development of wearable devices and smart switchable windows.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Physics, Condensed Matter
Ajay Kumar, Priyam, Harikesh Meena, Jai Prakash, Ling Wang, Gautam Singh
Summary: Ferroelectric liquid crystals (FLCs) have excellent electro-optical properties compared to nematic liquid crystals (LCs), and the dispersion of nanomaterials (NMs) in FLCs can further improve their electro-optical properties. Semiconducting nanomaterials (SNMs), in particular, have shown great potential in enhancing molecular alignment, dielectric behavior, memory effect, switching response, and photoluminescence in FLCs.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Ariba Parveen, Ajeet K. Kaushik, Jai Prakash
Summary: The study presents a novel liquid crystal-based biosensor for detecting histamine levels, utilizing the orientational transition of a nematic liquid crystal by enzymatic reaction. The biosensor provides a good optical and dielectric response with a detection limit ranging from 20 mg/L to 500 mg/L.
Article
Chemistry, Physical
Ariba Parveen, Jai Prakash, Gautam Singh
Summary: The impact of ferroelectric nanoparticles (FNPs), specifically strontium titanate (SrTiO3), on the dielectric, electro-optical, and electrical response of a room temperature liquid crystal (NLC), 5CB, has been investigated. The results show that the low frequency dielectric relaxation shifts towards higher frequency with increasing concentration of FNPs, but decreases to even lower than the pure sample at approximately 2 wt% concentration. The short axis molecular relaxation observed in a homeotropic cell shifts towards higher frequency by approximately 28% in the composites, independent of concentration. Furthermore, the dielectric spectra in the composites do not return to their original state even after approximately 22 minutes, indicating an apparent dielectric memory effect. The voltage dependent optical textures confirm the short term memory in the composites. The electrical response of the composites is also significantly different from the pure sample, further confirming the impact of FNPs on NLC.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Depanshu Varshney, Jai Prakash, Gautam Singh
Summary: This article investigates the alignment of liquid crystal (LC) molecules on the desired substrate using the noncontact-based technique. The study demonstrates the achievement of various alignment modes (homogeneous and homeotropic) by dispersing indium tin oxide (ITO) nanoparticles (0.25 wt% and 1 wt%) in an ITO sample cell without an alignment layer. The tunability in alignment is attributed to the interaction between ITO nanoparticles and their arrangements on the substrate.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Physics, Multidisciplinary
Jai Prakash, Depanshu Varshney, Shikha Chauhan, Ajeet Kaushik, Yogendra Kumar Mishra
Summary: Liquid crystals (LCs) have attracted scientific curiosity due to their combined properties of liquid and crystalline phases. Despite the development of breakthrough technologies, further refinement of LC materials is necessary for their applications in modern technologies. Understanding the behavior of LC materials under radiation and the associated risks is limited. Therefore, a review of different studies is important for better understanding and future directions. This review focuses on the variation of LC material parameters under irradiation, discusses the possible reasons behind the changes, and highlights the current and future radiation-based applications of LC materials.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
P. Priscill, Deepanshu Varshney, Jai Prakash, Sandeep Kumar, Ashwani Singh, Praveen Malik, Supreet, Arvind K. Gathania, Riccardo Castagna, Daniele Eugenio Lucchetta, Gautam Singh
Summary: We report the induction of thermally stable vertical alignment of nematic liquid crystal in a planar anchored cell by doping with eco-friendly carbon dots. Optical and dielectric studies confirm the induced vertical alignment and suggest the potential application of these composites in eco-friendly liquid crystal displays and other photonic devices.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Depanshu Varshney, Jai Prakash, Gautam Singh
Summary: In this article, the researchers investigate the influence of indium tin oxide (ITO) nanoparticles on the macroscopic molecular arrangement of a nematic liquid crystal material. They observe the dispersion and miscibility of ITO nanoparticles in the liquid crystal phase and study the dielectric parameters of the composites. The results show that the concentration of ITO nanoparticles affects the dielectric permittivity and relaxation frequency, as well as the clearing temperature of the liquid crystal material.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Multidisciplinary Sciences
Deepa Agashe, Sugandha Maheshwary, Jitendra Kumar Pattanaik, Jai Prakash, Pragya Bhatt, S. S. Arya, Sriparna Chatterjee, Pankaj Kumar, Paramdeep Singh, Nazia Abbas, Chandra Shekhar Sharma, Chirasree Roy Chaudhuri, Pooja Devi
Summary: The scientific enterprise in India has grown rapidly, and the status and concerns of young scientists are poorly understood. The Indian National Young Academy of Sciences conducted a survey and found that young scientists face challenges in establishing independent research careers, and proposed solutions to address them.
Article
Multidisciplinary Sciences
Jai Prakash, Depanshu Varshney, Michal Czerwinski
Summary: This article presents the formulation, characterization, and application of a newly prepared ferroelectric liquid crystal mixture named W315, including the observation of phase transitions and material constants. The findings can be used as valuable references for the development of FLC-based devices.
PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY
(2021)
Article
Education, Scientific Disciplines
Ariba Parveen, Jai Prakash
Summary: Liquid crystals (LCs) based biosensors are promising systems for detecting various bioanalytes and diseases due to their simplicity, high sensitivity, and low cost. These biosensors rely on the ordering transformations of LC molecules induced by specific molecule binding, providing rapid, cost-effective, and selective detection of chemicals and biological analytes for better healthcare.
RESONANCE-JOURNAL OF SCIENCE EDUCATION
(2021)
