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Srivastava P, Verma VK, Sabbarwal S, Singh M, Sahoo K, Koch B, Kumar M. White light-emitting, biocompatible, water-soluble metallic magnesium nanoclusters for bioimaging applications. NANOTECHNOLOGY 2022; 34:105702. [PMID: 36537740 DOI: 10.1088/1361-6528/aca545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Ultra-small (1.6 nm), water-soluble, white light-emitting (WLE), highly stable (∼8 months) BSA templated metallic (Mg0) nanoclusters (fluorescent magnesium nanoclusters = FMNCs) is developed using the green and facile route. Synthesis was facilitated by the reduction of magnesium salt, where template bovine serum albumin is utilized as a reducing agent and ascorbic acid act as a capping agent to impart stability in water, thereby obtaining stabilized Mg0nanoclusters In solution, stabilized Mg0nanoclusters produce white light (450-620 nm with FWHM ∼120 nm) upon 366 nm light excitation. This white light emission was found to have a CIE coordinate of 0.30, 0.33 [pure white light CIE (0.33, 0.33)]. Taking advantage of WLE and ultrasmall size, FMNCs were used forin vitrofluorescence imaging of HaCaT cell lines, yielding blue (τ= 2.94 ns, with a relative of QY = 1.2 % w.r.t QS), green (τ= 3.07 ns; relative quantum yield of 4.6% w.r.t R6G) and red (τ= 0.3 ns) images. Further, incubation of FMNCs with HEK293 (Human embryonic kidney cell) and cancerous MDA-MB-231 (Breast cancer cell line) human cell lines yielded 100 % cell viability. Current work is envisioned to contribute significantly in the area of science, engineering, and nanomedicine.
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Affiliation(s)
- Prachi Srivastava
- Nano2Micro Material Design Lab, IIT (BHU), Varanasi, India
- School of Biomedical Engineering, IIT (BHU), Varanasi-221005, India
| | - Vivek Kumar Verma
- Nano2Micro Material Design Lab, IIT (BHU), Varanasi, India
- School of Biomedical Engineering, IIT (BHU), Varanasi-221005, India
| | - Shivesh Sabbarwal
- Nano2Micro Material Design Lab, IIT (BHU), Varanasi, India
- Department of Chemical Engineering & Technology, IIT (BHU), Varanasi-221005, India
| | - Mamata Singh
- Department of Zoology, Banaras Hindu University, Varanasi-221005, India
| | - Kedar Sahoo
- Nano2Micro Material Design Lab, IIT (BHU), Varanasi, India
- Department of Chemical Engineering & Technology, IIT (BHU), Varanasi-221005, India
| | - Biplob Koch
- Department of Zoology, Banaras Hindu University, Varanasi-221005, India
| | - Manoj Kumar
- Nano2Micro Material Design Lab, IIT (BHU), Varanasi, India
- Department of Chemical Engineering & Technology, IIT (BHU), Varanasi-221005, India
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Molecularly imprinted fluoroprobes doped with Ag nanoparticles for highly selective detection of oxytetracycline in real samples. Anal Chim Acta 2021; 1161:338326. [PMID: 33896557 DOI: 10.1016/j.aca.2021.338326] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 02/07/2023]
Abstract
A molecularly imprinted polymer (MIP), which is synthesized by a nanomolding process around a template, has emerged as a promising analytical tool for environmental quality monitoring and food safety test. In this work, a fluoroprobe with Ag-doped MIP nanolayer (16 nm thickness) is successfully prepared for the highly selective detection of oxytetracycline (OTC) in real samples (i.e. Yangtze River water, swine urine). In the MIP nanolayer, two functional monomers (i.e. 4-(2-acrylamidoethylcarbamoyl)-3-fluorophenylboronic acid, methacrylic acid) synergistically constitute the specific recognition sites. Meanwhile, the doped Ag enhances the detection sensitivity (with a detection limit of 5.38 nM) and accelerates the detection rate (within 2.5 min) even in real samples. Therefore, the present study paves the way for the preparation of MIP-based fluoroprobes, showing great prospects in environmental quality and food safety tests.
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