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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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2022 - 20235
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Subject: Physics × End date: 2023 × Start date: 2020 × Thesis Type: M.Sc ×
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Now showing 1 - 5 of 5
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    ThesisItemOpen Access
    Synthesis of tin disulphide (SnS2) and its characterization
    (CCSHAU, HISAR, 2022-07) Deepika Rani; Vinay Kumar
    The utilization of two dimensional materials in electronic and optical appliances is increasing day by day because of their excellent properties which can be utilized in various applications. The goal of the current study is to synthesize tin disulphide by low cost, wet chemical method at room temperature. To investigate its morphology, size, structure, and optical characteristics, different characterization techniques were used including FTIR, XRD, UV-Vis spectroscopy, PL spectroscopy, FESEM. FTIR spectra show Sn-S and S-S stretching vibrations which provide verification for the fabrication of SnS2. The band gap obtained from PL spectrum was found almost of the same order as obtained from UV-Vis spectrum. FESEM pictures represent the well-defined spherical morphology of the prepared SnS2. The XRD outcomes show the crystalline nature of the SnS2.
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    ThesisItemOpen Access
    To study morphological and optical properties of doped zinc sulfide
    (CCSHAU, Hisar, 2023-05) Janvi; Vinay Kumar
    Zinc Sulphide (ZnS) is a semiconductor receiving discernible attention as a nanomaterial scale because of excellent ion accessibility, charge storage ability, enhanced luminescent efficiency and lifetime shorting in comparison to that of bulk. However, doping of manganese (Mn) ion enhances its optoelectronic properties due to large exciton energy and wide bandgap at room temperature. ZnS and Mn-doped ZnS have been synthesized using the hydrothermal approach with 5, 10, and 20 % of Mn dopants. Prepared samples were characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis and Photoluminescence (PL) spectroscopy. The XRD pattern confirmed the cubic sphalerite crystal structure of prepared nanoparticles (NPs) whereas FE-SEM micrographs showed sphere-shaped NPs. The EDX spectrum measurements showed that spectra of Mn-doped ZnS exhibit peak related to elemental Mn. The stretching mode of undoped ZnS was observed at 636 cm -1 and the Zn-S-Zn network was perturbed by the presence of Mn. The energy bandgap was found to be decreased with increasing doping percentage from 5 to 20%, which is agreed to XRD. The PL spectra of Mn-doped ZnS showed at room temperature exhibit both the blue defect-related emission and orange Mn +2 emission due to the 4 T1 – 6A1 transition.
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    ThesisItemOpen Access
    Fabrication of bismuth telluride thin film and study of its electrical properties
    (CCSHAU, Hisar, 2023-05) Pooja; Paul Singh
    In this study, thin films of Bismuth Telluride were fabricated successfully by using thermal evaporation method onto different substrates (i.e., glass and silica) at ambient temperature. Their structural, morphological, optical and electrical properties were investigated by using X-ray diffraction (XRD), Field Emission-Scanning Electron Microscopy (FE-SEM), Photoluminescence (PL) sepectrooscopy and SourceMeter Instrument, respectively. The FT-IR study showed that the prepared Bismuth Telluride films do not show any transmittance spectra. The XRD analysis revealed that the films were crystalline in nature. The surface mimages showed that the prepared films have a homogeneous and compact grain surface. The calculated optical band gap was about 2 eV for both types of film. The I-V characteristics of prepared thin films were analyzed at temperature ranges from 30°C to 100°C. It was found that the films fabricated onto silica substrates showed larger electrical conductivity than that of the films fabricated onto glass substrates. Also, the increment in electrical conductivity was observed with the temperature showing that the prepared films have negative temperature coefficient of resistance and exhibit the semiconductor behaviour.
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    ThesisItemOpen Access
    Characterization of biochar prepared from coconut shell at different temperatures
    (CCS HAU, Hisar, 2022-07-22) Bhawna; Dahiya, Rita
    Pyrolysis process can be the solution to problems that arises due to the improper management of biowaste. This process might be used to produce valuable carbonaceous products like biochar. The present study is focused on the preparation of biochar from coconut shell at different temperatures by pyrolysis. The obtained biochar was characterized by using analytical techniques like FTIR, XRD, BET, FE-SEM and UV-Vis spectroscopy. The properties of biochar like ash content, EC, pH, carbon content and CEC were also determined using standard methods. The FTIR spectra of the prepared biochar confirmed the presence of aromatic carbon functional group in the biochar structure. From the XRD plots, amorphous structure of the biochar is confirmed. The results indicated that as the pyrolysis temperature increased, the amorphous organic phase in the biochar structure decreased. The FE-SEM images showed the porous structure of biochar prepared at a high temperature of 700 °C. The BET analysis showed that as the pyrolysis temperature increased, surface area as well as porosity of the biochar increased.
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    ThesisItemOpen Access
    Study on temperature dependent dielectric properties of edible oils for quality assessment
    (CCS HAU, Hisar, 2022-07-22) Meena; Paul Singh
    Edible oils adulteration has remained a global issue for years. Being an essential element of our daily diet, quality assessment of edible oils has become necessary. The present work focuses on use of dielectric properties for quality assessment of edible oils. The dielectric properties of edible oils (groundnut, mustard, sunflower and sesame) such as dielectric constant and electrical conductivity were investigated in a frequency range between 900 to 2700 MHz by using a dielectric assessment kit (DAK). With increase in palm oil adulteration, the dielectric constant of groundnut and mustard oil increased while for sunflower and sesame oil, it slightly decreased. For all the oil samples, electrical conductivity showed a slight change with increase in palm oil adulteration. The dielectric constant and electrical conductivity of oils were also analysed at different temperatures and at repetitive heating cycles. Both dielectric constant and electrical conductivity increased with increase in temperature and number of repetitive heating cycles.