Rajkumar Dey

Jadavpur University

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Shamima Hussain

UGC DAE Consortium for Scientific Research

A.K. Pal

Sam Higginbottom Institute of Agriculture

Radhaballav Bhar

Jadavpur University

Ritamay Bhunia

S.N. Bose National Centre for Basic Sciences

Abhishek Thakur

National Institute of Technology Hamirpur

Ashok K. Yadav

Jain University

Siddhartha Dam

University of Würzburg

D. Bhattacharyya

Bhabha Atomic Research Centre

S. N. Jha

University of California, Los Angeles

S. Dolai

Indian Institute of Engineering Science and Technology, Shibpur

Cooperative Institutions

Jadavpur University

Indira Gandhi Centre for Atomic Research

UGC DAE Consortium for Scientific Research

Homi Bhabha National Institute

University of Madras

Indian Association for the Cultivation of Science

Bhabha Atomic Research Centre

Raja Ramanna Centre for Advanced Technology

CSIR National Physical Laboratory of India

Panjab University

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Probing local structure of co doped polyvinylidene fluoride-ZnO thin films using X-ray absorption spectroscopy

Spectrochimica Acta Part B Atomic Spectroscopy (2017)

Rajkumar Dey Ashok K. Yadav Ritamay Bhunia S. N. Jha D. Bhattacharyya

XANES

Nanocrystalline material

Wurtzite crystal structure

Polyvinylidene fluoride

X-ray absorption spectroscopy

10.1016/j.sab.2017.03.018

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Citations (5)

Temperature Raman Studies of Freestanding and Flexible Thin Films of CdS‐doped PVDF

Polymer Composites (2018)

Abhishek Thakur Siddhartha Dam Rajkumar Dey Amarendra Gangavarappu Shamima Hussain

Temperature dependent Raman studies have been carried out on free standing thin films of (Poly(vinylidene fluoride)) incorporated with nano‐crystalline (Cadmium sulphide). Well‐defined signatures of both PVDF as well as CdS could be observed from the Raman spectra of the composite films. Peak shifts toward higher wavenumber for modes of CdS were observed at low temperature. Doping dramatically modulates the phases of polyvinyldene fluoride (PVDF). Microstructural studies revealed additional granular structure on incorporation of CdS nanoparticles into the otherwise fibrous PVDF. Energy Dispersive Spectroscopy (EDS) study confirms the elemental composition of the samples. The thermal conductivity of the composite film was obtained from Raman studies. POLYM. COMPOS., 40:2662–2667, 2019. © 2018 Society of Plastics Engineers

10.1002/pc.25062

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Citations (3)

Realization of diode structures on paper: an example of papertronics

Current Applied Physics (2024)

Rajkumar Dey Shamima Hussain A.K. Pal

Realization (probability)

10.1016/j.cap.2024.10.001

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Citations (1)

Structural and Optical Studies on Sol-gel Composites of Nickel-Doped Nanocrystalline Zinc Oxide/Polyvinylidene Fluoride

Polymer-Plastics Technology and Engineering (2016)

Rajkumar Dey Ritamay Bhunia Shamima Hussain Bibhas Ranjan Chakraborty Radhaballav Bhar

Nickel-doped nanocrystalline ZnO with three different Ni concentrations was incorporated in polyvinylidene fluoride thin film for obtaining free-standing flexible film by sol-gel technique. The effect of Ni–ZnO loading on the optical and microstructural properties of the Ni–ZnO/polyvinylidene fluoride composite films was studied. X-ray photoelectron spectroscopy and Raman studies were performed to characterize the bonding environment. Fluorine-terminated surface showed a strong F1 s peak located at ∼695 eV arising out of C–F bonds. Existence of β phase of polyvinylidene fluoride along with the presence of ZnO nanocrystals were indicated by Raman studies. Secondary ion mass spectrometry studies indicated the distribution of Ni–ZnO particles in the polyvinylidene fluoride matrix.

Polyvinylidene fluoride

Nanocrystalline material

Nickel oxide

10.1080/03602559.2016.1233252

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Citations (8)

Enhanced piezo‐electric property induced in graphene oxide/polyvinylidene fluoride composite flexible thin films

Polymer Composites (2017)

Ritamay Bhunia Rajkumar Dey Shirsendu Das Shamima Hussain Radhaballav Bhar

Graphene oxide/PVDF composite free‐standing flexible films were prepared with different amount of GO fillers in PVDF matrix using sol‐gel technique. The films were characterized by Field emission scanning electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy (FTIR), X‐ray photoelectron spectroscopy (XPS) and Raman studies. Results FTIR, XPS, and Raman were critically analysed for modulation of bonding ambience. The GO/PVDF composite films indicated films to be sp 2 rich. Departure from centro‐symmetry of GO when embedded in PVDF matrix leading towards efficient nanogenerator application is discussed critically in the light of Raman and XPS studies. High output voltage was recorded for the unpoled film while the poled samples indicated very negligible output. A rectifying circuit was used to charge a capacitor which was discharged for supplying energy to trigger a red light emitting diode. A maximum a.c. output voltage of ±28V was recorded at microwatt power level. Increments in output voltages with increased GO loading in the PVDF matrix were observed. POLYM. COMPOS., 39:4205–4216, 2018. © 2017 Society of Plastics Engineers

Polyvinylidene fluoride

10.1002/pc.24493

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Citations (18)

Phosphorus doping of diamond-like carbon films by radio frequency CVD-cum-evaporation technique

Diamond and Related Materials (2018)

Rajkumar Dey S. Dolai Shamima Hussain Radhaballav Bhar A.K. Pal

Diamond-like carbon

Carbon fibers

10.1016/j.diamond.2018.01.002

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Citations (22)

Local structure studies of Ni doped ZnO/PVDF composite free-standing flexible thin films using XPS and EXAFS studies

Journal of Polymer Research (2016)

Ashok K. Yadav Rajkumar Dey Ritamay Bhunia Shamima Hussain S. N. Jha

XANES

10.1007/s10965-016-1162-7

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Citations (10)

Photovoltaic properties of F:SnO2/CdS/CuO/Ag heterojunction solar cell

Materials Research Bulletin (2018)

S. Dolai Rajkumar Dey Shamima Hussain Radhaballav Bhar A.K. Pal

Field emission microscopy

10.1016/j.materresbull.2018.09.022

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Citations (24)

Performance of Ag/CdS/Au Schottky diode fabricated on free-standing cellulose paper

Materials Science in Semiconductor Processing (2022)

Rajkumar Dey Shamima Hussain A.K. Pal

10.1016/j.mssp.2022.106862

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Citations (4)

Enhancement of β phase in PVDF thin films with metal doping

AIP conference proceedings (2019)

Abhishek Thakur Siddhartha Dam Rajkumar Dey P. Magudapathy G. Amarendra

Freestanding thin films of PVDF doped with Indium (In) and Antimony (Sb) were synthesized by sol-gel method. The films were characterized by SEM, EDS, XRD, and FTIR spectroscopy. As prepared films were in mixed phase with γ phase predominant. SEM depicts the uniformity of the films. The different phases were probed using XRD and FTIR studies. Interconversion of phases due to metal doping has been reported.

10.1063/1.5113380

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