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  1. Article ; Online: Fabrication of highly conductive graphene paper for supercapacitors with a one-step hydrothermal method

    Rajesh Ghosh / Mohd Salman Siddiqui / Hemen Kalita

    Carbon Trends, Vol 14, Iss , Pp 100317- (2024)

    1481  

    Abstract: We present a facile one-step hydrothermal method for the fabrication of free-standing graphene paper using aqueous graphene oxide (GO) dispersion as the starting material. Notably, the method does not require the use of any additives for the reduction ... ...

    Abstract We present a facile one-step hydrothermal method for the fabrication of free-standing graphene paper using aqueous graphene oxide (GO) dispersion as the starting material. Notably, the method does not require the use of any additives for the reduction and preparation of the graphene paper. The resulting graphene paper exhibits a high degree of reduction, as confirmed by X-ray photoelectron spectroscopy (XPS) analysis, revealing a carbon-to-oxygen (C/O) ratio of ∼7. The fabricated graphene paper also demonstrates excellent conductivity, with a measured value of ∼1900 S/m, and sheet resistance of around 100 Ω/sq. Furthermore, the energy storage capability of the graphene paper based electrode is evaluated, which shows a promising specific capacity of 249 F/g at a current density of 1 A/g in 1M H2SO4 as the ionic medium. Additionally, the electrode has also demonstrated remarkable energy density and power density values of 28.68 Wh/Kg and 455 W/Kg, respectively. Overall, the resulting graphene paper exhibits high conductivity and excellent electrochemical performance, making it a promising candidate for various energy storage applications.
    Keywords graphene paper ; hydrothermal ; additive free ; highly conducting ; supercapacitor ; Chemistry ; QD1-999
    Subject code 620
    Language English
    Publishing date 2024-03-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: One-step facile and novel method for the growth of vertical graphene oxide and its potential application in infrared sensing

    Rajesh Ghosh / Hemen Kalita

    Carbon Trends, Vol 9, Iss , Pp 100198- (2022)

    2022  

    Abstract: We report a facile one-step method for the preparation of vertical graphene oxide (VGO) nanosheets from graphene oxide (GO). Here, the GO dispersion with appropriate concentration is thermally heated to obtain a thin layer of VGO sheets at the surface of ...

    Abstract We report a facile one-step method for the preparation of vertical graphene oxide (VGO) nanosheets from graphene oxide (GO). Here, the GO dispersion with appropriate concentration is thermally heated to obtain a thin layer of VGO sheets at the surface of the solution. The vertical structure of GO sheets is confirmed by the surface morphology studies showing its presence in an area of 7 × 13 μm2 in size over the SiO2/Si substrate. The VGO nanosheets are also observed to form by heating the parent GO solution at different temperatures ranging from 110 to 140°C, while the growth time may vary. We have investigated the potential of prepared vertical graphene oxide for infrared (IR) sensing. The fabricated device based on VGO sheets demonstrated a maximum photosensitivity ∼190%, when illuminated with infrared radiation. The sensor demonstrates good repeatability in its photoresponse with response-recovery times of 68 ms and 63 ms, respectively, indicating a reliable and fast IR sensing. We also observe that the photosensitivity of the sensor towards IR illumination varies from 188.7% to 68.6% as the intensity varies from 28.7 to 6.4 mW/cm2. The findings presented here demonstrate the potential of vertical graphene oxide nanosheets for potential IR sensing.
    Keywords Graphene ; Graphene oxide ; Chemically derived graphene ; Vertical graphene ; Infrared sensing ; Chemistry ; QD1-999
    Subject code 620
    Language English
    Publishing date 2022-10-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Genetic Parameters and Combining Ability Effects of Parents for Seed Yield and other Quantitative Traits in Black Gram [Vigna mungo (L.) Hepper]

    Supriyo CHAKRABORTY / Hironya Kumar BORAH / Birinchi Kumar BORAH / Dalim PATHAK / Bipin Kumar BARUAH / Hemen KALITA / Bhubaneswar BARMAN

    Notulae Scientia Biologicae, Vol 2, Iss 2, Pp 121-

    2010  Volume 126

    Abstract: Line x tester analysis was carried out in black gram [Vigna mungo (L.) Hepper], an edible legume, to estimate the gca (general combining ability) effects of parents (3 lines and 3 testers) and the SCA (specific combining ability) effects of 9 crosses for ...

    Abstract Line x tester analysis was carried out in black gram [Vigna mungo (L.) Hepper], an edible legume, to estimate the gca (general combining ability) effects of parents (3 lines and 3 testers) and the SCA (specific combining ability) effects of 9 crosses for seed yield and other eleven quantitative traits. Though additive and nonadditive gene actions governed the expression of quantitative traits, the magnitude of nonadditive gene action was higher than that of additive gene action for each quantitative trait. Two parents viz. �UG157� and �DPU915� were good general combiners. Two crosses namely �PDB 88-31�/�DPU 915� and �PLU 277�/�KAU7� had high per se performance along with positive significant SCA effect for seed yield/plant. The degree of dominance revealed overdominance for all the traits except clusters/plant with partial dominance. The predictability ratio also revealed the predominant role of nonadditive gene action in the genetic control of quantitative traits. Narrow sense heritability was also low for each trait. Recurrent selection or biparental mating followed by selection which can exploit both additive and nonadditive gene actions would be of interest for yield improvement in black gram. Due to presence of high magnitude of nonadditive gene action, heterosis breeding could also be attempted to develop low cost hybrid variety using genetic male sterility system in black gram.
    Keywords Agriculture (General) ; S1-972 ; Science (General) ; Q1-390
    Subject code 580
    Language English
    Publishing date 2010-06-01T00:00:00Z
    Publisher University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Genetic Parameters and Combining Ability Effects of Parents for Seed Yield and other Quantitative Traits in Black Gram [Vigna mungo (L.) Hepper]

    Supriyo CHAKRABORTY / Hironya Kumar BORAH / Birinchi Kumar BORAH / Dalim PATHAK / Bipin Kumar BARUAH / Hemen KALITA / Bhubaneswar BARMAN

    Notulae Scientia Biologicae, Vol 2, Iss 2, Pp 121-

    2010  Volume 126

    Abstract: Line x tester analysis was carried out in black gram [Vigna mungo (L.) Hepper], an edible legume, to estimate the gca (general combining ability) effects of parents (3 lines and 3 testers) and the SCA (specific combining ability) effects of 9 crosses for ...

    Abstract Line x tester analysis was carried out in black gram [Vigna mungo (L.) Hepper], an edible legume, to estimate the gca (general combining ability) effects of parents (3 lines and 3 testers) and the SCA (specific combining ability) effects of 9 crosses for seed yield and other eleven quantitative traits. Though additive and nonadditive gene actions governed the expression of quantitative traits, the magnitude of nonadditive gene action was higher than that of additive gene action for each quantitative trait. Two parents viz. �UG157� and �DPU915� were good general combiners. Two crosses namely �PDB 88-31�/�DPU 915� and �PLU 277�/�KAU7� had high per se performance along with positive significant SCA effect for seed yield/plant. The degree of dominance revealed overdominance for all the traits except clusters/plant with partial dominance. The predictability ratio also revealed the predominant role of nonadditive gene action in the genetic control of quantitative traits. Narrow sense heritability was also low for each trait. Recurrent selection or biparental mating followed by selection which can exploit both additive and nonadditive gene actions would be of interest for yield improvement in black gram. Due to presence of high magnitude of nonadditive gene action, heterosis breeding could also be attempted to develop low cost hybrid variety using genetic male sterility system in black gram.
    Keywords Agriculture (General) ; S1-972 ; Science (General) ; Q1-390
    Subject code 580
    Language English
    Publishing date 2010-06-01T00:00:00Z
    Publisher Society of Land Measurements and Cadastre from Transylvania (SMTCT)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Genetic Parameters and Combining Ability Effects of Parents for Seed Yield and other Quantitative Traits in Black Gram [Vigna mungo (L.) Hepper]

    Supriyo CHAKRABORTY / Hironya Kumar BORAH / Birinchi Kumar BORAH / Dalim PATHAK / Bipin Kumar BARUAH / Hemen KALITA / Bhubaneswar BARMAN

    Notulae Scientia Biologicae, Vol 2, Iss 2, Pp 121-

    2010  Volume 126

    Abstract: Line x tester analysis was carried out in black gram [Vigna mungo (L.) Hepper], an edible legume, to estimate the gca (general combining ability) effects of parents (3 lines and 3 testers) and the SCA (specific combining ability) effects of 9 crosses for ...

    Abstract Line x tester analysis was carried out in black gram [Vigna mungo (L.) Hepper], an edible legume, to estimate the gca (general combining ability) effects of parents (3 lines and 3 testers) and the SCA (specific combining ability) effects of 9 crosses for seed yield and other eleven quantitative traits. Though additive and nonadditive gene actions governed the expression of quantitative traits, the magnitude of nonadditive gene action was higher than that of additive gene action for each quantitative trait. Two parents viz. UG157 and DPU915 were good general combiners. Two crosses namely PDB 88-31/DPU 915 and PLU 277/KAU7 had high per se performance along with positive significant SCA effect for seed yield/plant. The degree of dominance revealed overdominance for all the traits except clusters/plant with partial dominance. The predictability ratio also revealed the predominant role of nonadditive gene action in the genetic control of quantitative traits. Narrow sense heritability was also low for each trait. Recurrent selection or biparental mating followed by selection which can exploit both additive and nonadditive gene actions would be of interest for yield improvement in black gram. Due to presence of high magnitude of nonadditive gene action, heterosis breeding could also be attempted to develop low cost hybrid variety using genetic male sterility system in black gram.
    Keywords Agriculture (General) ; S1-972 ; Science (General) ; Q1-390
    Subject code 580
    Language English
    Publishing date 2010-06-01T00:00:00Z
    Publisher Society of Land Measurements and Cadastre from Transylvania (SMTCT)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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