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  1. Article ; Online: Syntheses of metal oxide-gold nanocomposites for biological applications

    Kanika Bharti / Kalyan K. Sadhu

    Results in Chemistry, Vol 4, Iss , Pp 100288- (2022)

    2022  

    Abstract: A range of synthetic approaches for metal oxide-gold nanocomposites from conventional method such as chemical vapor deposition (CVD), pulse laser ablation to more simple and facile synthetic approaches using mild condition have been discussed. These ... ...

    Abstract A range of synthetic approaches for metal oxide-gold nanocomposites from conventional method such as chemical vapor deposition (CVD), pulse laser ablation to more simple and facile synthetic approaches using mild condition have been discussed. These nanocomposites have found diverse potential biological applications including cell imaging, photothermal therapy, chemotherapy, radiotherapy, determining oxidative stress in tumor cells, glucose oxidation, enzyme mimic activity, nitrogen fixation and diagnosis purpose such as detecting cancer biomarkers such as prostate protein antigen (PSA), alpha fetoprotein (AFP), melanoma adhesion molecule antigen (CD146), DNA sensing. The biosensing applications along with quantitative estimation of bioanalytes such as choline (CHO), NADH, epinephrine (EP), 17β-estradiol (E2), uric acid (UA), ascorbic acid (AA), glucose and dopamine, α-synuclein, amyloid beta (Aβ) peptide, glutathione (GSH), calcium dipicolinate have been explored with these nanocomposites as platforms. Abnormal levels of hydrazine (principal component of various pharmaceutical derivative), Cr(VI), tertracyclin (broad spectrum antibiotic), 6-mercaptopurine (anticancer drug), Bisphenol A (BPA), chlorpyrifos and carbamate pesticides have been estimated with these metal oxide-gold nanocomposites. Various detection strategies for quantitative analysis based on electrochemical, fluorometric and colorimetric methods have been briefly summarized.
    Keywords Gold-metal oxide nanocomposites ; Synthesis ; Biosensor ; Enzyme-mimic activity ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Tryptophan-Stabilized Au–FexOy Nanocomposites as Electrocatalysts for Oxygen Evolution Reaction

    Shahbaz Ahmad Lone / Soumen Ghosh / Kalyan K. Sadhu

    ACS Omega, Vol 4, Iss 2, Pp 3385-

    2019  Volume 3391

    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2019-02-01T00:00:00Z
    Publisher American Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Green Synthesis of Luminescent Gold-Zinc Oxide Nanocomposites

    Kanika Bharti / Shahbaz Ahmad Lone / Ankita Singh / Sandip Nathani / Partha Roy / Kalyan K. Sadhu

    Frontiers in Chemistry, Vol

    Cell Imaging and Visible Light–Induced Dye Degradation

    2021  Volume 9

    Abstract: Green synthesis of gold-zinc oxide (Au-ZnO) nanocomposite was successfully attempted under organic solvent–free conditions at room temperature. Prolonged stirring of the reaction mixture introduced crystallinity in the ZnO phase of Au-ZnO nanocomposites. ...

    Abstract Green synthesis of gold-zinc oxide (Au-ZnO) nanocomposite was successfully attempted under organic solvent–free conditions at room temperature. Prolonged stirring of the reaction mixture introduced crystallinity in the ZnO phase of Au-ZnO nanocomposites. Luminescence properties were observed in these crystalline Au-ZnO nanocomposites due to in situ embedding of gold nanoparticles (AuNP) of 5–6 nm diameter on the surface. This efficient strategy involved the reduction of Au(III) by Zn(0) powder in aqueous medium, where sodium citrate (NaCt) was the stabilizing agent. Reaction time and variation of reagent concentrations were investigated to control the Au:Zn ratio within the nanocomposites. The reaction with the least amount of NaCt for a long duration resulted in Au-ZnO/Zn(OH)2 nanocomposite. X-ray photoelectron spectroscopy (XPS) confirmed the formation of Zn(OH)2 and ZnO in the same nanocomposite. These nanocomposites were reconnoitered as bioimaging materials in human cells and applied for visible light–induced photodegradation of rhodamine-B dye.
    Keywords nanocomposites ; green synthesis ; luminescence ; photodegradation ; redox chemistry ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2021-04-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Nucleic Acid-tagged Peptides

    Kalyan K. Sadhu / Nicolas Winssinger

    CHIMIA, Vol 67, Iss

    Encoding Libraries and Controlling Dimerization and Conformation

    2013  Volume 12

    Abstract: Recent progress in the synthesis, screening, and self-assembly of nucleic acid–tagged peptidic libraries is reviewed. ...

    Abstract Recent progress in the synthesis, screening, and self-assembly of nucleic acid–tagged peptidic libraries is reviewed.
    Keywords Combinatorial peptide synthesis ; Dna ; Encoding ; Multivalency ; Pna ; Self-assembly ; Chemistry ; QD1-999
    Language German
    Publishing date 2013-12-01T00:00:00Z
    Publisher Swiss Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: Regioisomeric cryptand stabilized gold supraspheres and elongated dodecahedron supraparticles for reversible host–guest chemistry

    Saini, Meenaxi / Ashish Verma / Kalyan K. Sadhu / Kapil Tomar / Parimal K. Bharadwaj

    Chemical communications. 2018 Nov. 13, v. 54, no. 91

    2018  

    Abstract: Addition of bis-pyrazole based cryptand regioisomers (1 and 2) to citrate stabilized gold nanoparticles (AuNPs) led to gold supraspheres (AuSSL) and elongated dodecahedron (AuEDL) supraparticles, respectively. These supraparticles as heterogenous hosts ... ...

    Abstract Addition of bis-pyrazole based cryptand regioisomers (1 and 2) to citrate stabilized gold nanoparticles (AuNPs) led to gold supraspheres (AuSSL) and elongated dodecahedron (AuEDL) supraparticles, respectively. These supraparticles as heterogenous hosts show a high uptake of a small fluorophore SEA-SC1 in an aqueous medium and reversible release in organic solvents.
    Keywords chemical reactions ; citrates ; fluorescent dyes ; gold ; nanogold ; positional isomers ; solvents
    Language English
    Dates of publication 2018-1113
    Size p. 12836-12839.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c8cc07589a
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Nucleic Acid Templated Chemical Reaction in a Live Vertebrate

    Laurent Holtzer / Igor Oleinich / Marcello Anzola / Eric Lindberg / Kalyan K. Sadhu / Marcos Gonzalez-Gaitan / Nicolas Winssinger

    ACS Central Science, Vol 2, Iss 6, Pp 394-

    2016  Volume 400

    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2016-05-01T00:00:00Z
    Publisher American Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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