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Zhao Z, Zharnikov M. Gold Nanoparticle-Loaded Porous Poly(ethylene glycol) Nanosheets for Electrochemical Detection of H 2O 2. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3137. [PMID: 38133034 PMCID: PMC10745603 DOI: 10.3390/nano13243137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/06/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023]
Abstract
The effective detection of hydrogen peroxide (H2O2) in different environments and, above all, in biological media, is an important practical issue. To this end, we designed a novel electrochemical sensor for H2O2 detection by introducing gold nanoparticles (AuNPs) into the porous poly(ethylene glycol) (PEG) matrix formed by the thermally activated crosslinking of amino- and epoxy-decorated STAR-PEG precursors. The respective composite PEG-AuNP films could be readily prepared on oxidized Si substrates, separated from them as free-standing nanosheets, and transferred as H2O2 sensing elements onto the working electrode of the electrochemical cell, with the performance of the sensing element relied on the established catalytic activity of AuNPs with respect to H2O2 decomposition. The sensitivity, detection limit, and the operation range of the composite PEG-AuNP sensors were estimated at ~3.4 × 102 μA mM-1 cm-2, 0.17 μM of H2O2, and 20 μM-3.5 mM of H2O2, respectively, which are well comparable with the best values for other types of H2O2 sensors reported recently in literature. The particular advantages of the composite PEG-AuNP sensors are commercial source materials, a simple fabrication procedure, the bioinert character of the PEG matrix, the 3D character of the AuNP assembly, and the possibility of transferring the nanosheet sensing element to any secondary substrate, including the glassy carbon electrode of the electrochemical cell. In particular, the bioinert character of the PEG matrix can be of importance for potential biological and biomedical applications of the designed sensing platform.
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Affiliation(s)
| | - Michael Zharnikov
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany;
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Zhao Z, Zharnikov M. Exploiting epoxy-rich poly(ethylene glycol) films for highly selective ssDNA sensing via electrochemical impedance spectroscopy. Phys Chem Chem Phys 2023; 25:26538-26548. [PMID: 37752830 DOI: 10.1039/d3cp03851c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
This study introduces an alternative approach to immobilize thiolated single-stranded DNA (ssDNA) for the DNA sensing. In contrast to the standard, monomolecular assembly of such moieties on gold substrate, over the thiolate-gold anchors, we propose to use bioinert, porous polyethylene glycol (PEG) films as a 3D template for ssDNA immobilization. The latter process relies on the reaction between the thiol group of the respectively decorated ssDNA and the epoxy groups in the epoxy-rich PEG matrix. The immobilization process and subsequent hybridization ability of the resulting sensing assembly were monitored using cyclic voltammetry and electrochemical impedance spectroscopy, with the latter tool proving itself as the most suitable transduction technique. Electrochemical data confirmed the successful immobilization of thiol-decorated ssDNA probes into the PEG matrix over the thiol-epoxy linkage as well as high hybridization efficiency, selectivity, and sensitivity of the resulting DNA sensor. Whereas this sensor was equivalent to the direct ssDNA assembly in terms of the efficiency, it exhibited a better selectivity and bioinert properties in view of the bioinert character of the PEG matrix. The above findings place PEG films as a promising platform for highly selective ssDNA sensing, leveraging their flexible chemistry, 3D character, and bioinert properties.
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Affiliation(s)
- Zhiyong Zhao
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
| | - Michael Zharnikov
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
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Zhao Z, Das S, Zharnikov M. Rational Design of Porous Poly(ethylene glycol) Films as a Matrix for ssDNA Immobilization and Hybridization. Bioengineering (Basel) 2022; 9:bioengineering9090414. [PMID: 36134960 PMCID: PMC9496007 DOI: 10.3390/bioengineering9090414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 11/24/2022] Open
Abstract
Poly(ethylene glycol) (PEG) films, fabricated by thermally induced crosslinking of amine- and epoxy-terminated four-arm STAR-PEG precursors, were used as porous and bioinert matrix for single-stranded DNA (ssDNA) immobilization and hybridization. The immobilization relied on the reaction between the amine groups in the films and N-hydroxy succinimide (NHS) ester groups of the NHS-ester-decorated ssDNA. Whereas the amount of reactive amine groups in the films with the standard 1:1 composition of the precursors turned out to be too low for efficient immobilization, it could be increased noticeably using an excess (2:1) concentration of the amine-terminated precursor. The respective films retained the bioinertness of the 1:1 prototype and could be successfully decorated with probe ssDNA, resulting in porous, 3D PEG-ssDNA sensing assemblies. These assemblies exhibited high selectivity with respect to the target ssDNA strands, with a hybridization efficiency of 78–89% for the matching sequences and full inertness for non-complementary strands. The respective strategy can be applied to the fabrication of DNA microarrays and DNA sensors. As a suitable transduction technique, requiring no ssDNA labeling and showing high sensitivity in the PEG-ssDNA case, electrochemical impedance spectroscopy is suggested.
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Ganguly S, Margel S. 3D printed magnetic polymer composite hydrogels for hyperthermia and magnetic field driven structural manipulation. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101574] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Elastic Properties of Poly(ethylene glycol) Nanomembranes and Respective Implications. MEMBRANES 2022; 12:membranes12050509. [PMID: 35629834 PMCID: PMC9143594 DOI: 10.3390/membranes12050509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 12/04/2022]
Abstract
Free-standing poly(ethylene glycol) (PEG) membranes were prepared from amine- and epoxy-terminated four-arm STAR-PEG precursors in a thickness range of 40–320 nm. The membranes feature high stability and an extreme elasticity, as emphasized by the very low values of Young’s modulus, varying from 2.08 MPa to 2.6 MPa over the studied thickness range. The extreme elasticity of the membranes stems from the elastomer-like character of the PEG network, consisting of the STAR-PEG cores interconnected by crosslinked PEG chains. This elasticity is only slightly affected by a moderate reduction in the interconnections at a deviation from the standard 1:1 composition of the precursors. However, both the elasticity and stability of the membranes are strongly deteriorated by a strong distortion of the network imposed by electron irradiation of the membranes. In contrast, exposure of the membranes to ultraviolet (UV) light (254 nm) does not affect their elastic properties, supporting the assumption that the only effect of such treatment is the decomposition of the PEG material with subsequent desorption of the released fragments. An analysis of the data allowed for the exclusion of so called “hot electrons” as a possible mechanism behind the modification of the PEG membranes by UV light.
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Karabel Ocal S, Patarroyo J, Kiremitler NB, Pekdemir S, Puntes VF, Onses MS. Plasmonic assemblies of gold nanorods on nanoscale patterns of poly(ethylene glycol): Application in surface-enhanced Raman spectroscopy. J Colloid Interface Sci 2018; 532:449-455. [DOI: 10.1016/j.jcis.2018.07.124] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 07/24/2018] [Accepted: 07/28/2018] [Indexed: 11/15/2022]
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Dubas AL, Tameev AR, Zvyagina AI, Ezhov AA, Ivanov VK, König B, Arslanov VV, Gribkova OL, Kalinina MA. Ultrathin Polydiacetylene-Based Synergetic Composites with Plasmon-Enhanced Photoelectric Properties. ACS APPLIED MATERIALS & INTERFACES 2017; 9:43838-43845. [PMID: 29185705 DOI: 10.1021/acsami.7b12156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fabricating plasmon-enhanced organic nanomaterials with technologically relevant supporting architectures on planar solids remains a challenging task in the chemistry of thin films and interfaces. In this work, we report a bottom-up assembly of ultrathin layered composites of conductive polymers with photophysical properties enhanced by gold nanoparticles. The polydiacetylene component was formed by photopolymerization of a catanionic mixture of pentacosadiynoic surfactants on a surface of citrate-stabilized gold hydrosol monitored by a fiber optic spectrometer. Microscopic examination of the 3 nm thick solid-immobilized film showed that gold nanoparticles (AuNPs) do not aggregate within the monolayer upon polymerization. This polydiacetylene/AuNPs monolayer was coupled with 60 nm thick polyaniline-based layer deposited atop. The resulting polymer composite with an integrated 4-stripe electric cell showed nonadditive electric behavior due to the formation of electron-hole pairs with increased charge carrier mobility at the interface between the polymer layers. Under visible light irradiation of the composite film, a plasmonic effect of the gold nanoparticles was observed at the onset of photoconductivity, although neither polydiacetylene nor the polyaniline component alone are photoconductive polymers. The results indicate that our bottom-up strategy can be expanded to design other plasmon-enhanced ultrathin polymer composites with potential applications in optoelectronics and photovoltaics.
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Affiliation(s)
- Anastasiia L Dubas
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119071, Russia
| | - Alexey R Tameev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119071, Russia
| | - Alexandra I Zvyagina
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119071, Russia
| | - Alexander A Ezhov
- Faculty of Physics, M. V. Lomonosov Moscow State University , 1-2 Leninskiye Gory, GSP-1, Moscow 119991, Russia
- A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences , 29 Leninsky prospect, Moscow 119991, Russia
| | - Vladimir K Ivanov
- N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119991, Russia
- Faculty of Materials Science, M. V. Lomonosov Moscow State University , 1-73 Leninskiye Gory, GSP-1, Moscow 119991, Russia
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg , D-93040 Regensburg, Germany
| | - Vladimir V Arslanov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119071, Russia
| | - Oxana L Gribkova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119071, Russia
| | - Maria A Kalinina
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , 31 Leninsky prospect, Moscow 119071, Russia
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Yuan M, Liu KK, Singamaneni S, Chakrabartty S. Self-Powered Forward Error-Correcting Biosensor Based on Integration of Paper-Based Microfluidics and Self-Assembled Quick Response Codes. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2016; 10:963-971. [PMID: 28113178 DOI: 10.1109/tbcas.2016.2580156] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper extends our previous work on silver-enhancement based self-assembling structures for designing reliable, self-powered biosensors with forward error correcting (FEC) capability. At the core of the proposed approach is the integration of paper-based microfluidics with quick response (QR) codes that can be optically scanned using a smart-phone. The scanned information is first decoded to obtain the location of a web-server which further processes the self-assembled QR image to determine the concentration of target analytes. The integration substrate for the proposed FEC biosensor is polyethylene and the patterning of the QR code on the substrate has been achieved using a combination of low-cost ink-jet printing and a regular ballpoint dispensing pen. A paper-based microfluidics channel has been integrated underneath the substrate for acquiring, mixing and flowing the sample to areas on the substrate where different parts of the code can self-assemble in presence of immobilized gold nanorods. In this paper we demonstrate the proof-of-concept detection using prototypes of QR encoded FEC biosensors.
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Khan M, Schuster S, Zharnikov M. Chemical derivatization and biofunctionalization of hydrogel nanomembranes for potential biomedical and biosensor applications. Phys Chem Chem Phys 2016; 18:12035-42. [DOI: 10.1039/c5cp07840g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Men Y, Wang W, Xiao P, Gu J, Sun A, Huang Y, Zhang J, Chen T. Controlled evaporative self-assembly of Fe3O4 nanoparticles assisted by an external magnetic field. RSC Adv 2015. [DOI: 10.1039/c5ra02160j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
A simple yet robust approach of magnetic field assisted controlled evaporative self-assembly (CESA) is developed to achieve Fe3O4 nanoparticles (NPs) micro- and nano-patterns in two dimensional (2D) direction.
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Affiliation(s)
- Yonghong Men
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- China
- Division of Polymer and Composite Materials
| | - Wenqin Wang
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- China
| | - Peng Xiao
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Jincui Gu
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Aihua Sun
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Youju Huang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Jiawei Zhang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Tao Chen
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
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Li X, Wang C, Shao J, Ding Y, Tian H, Li X, Wang L. Periodic parallel array of nanopillars and nanoholes resulting from colloidal stripes patterned by geometrically confined evaporative self-assembly for unique anisotropic wetting. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20300-20308. [PMID: 25353399 DOI: 10.1021/am505835z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this paper we present an economical process to create anisotropic microtextures based on periodic parallel stripes of monolayer silica nanoparticles (NPs) patterned by geometrically confined evaporative self-assembly (GCESA). In the GCESA process, a straight meniscus of a colloidal dispersion is initially formed in an opened enclosure, which is composed of two parallel plates bounded by a U-shaped spacer sidewall on three sides with an evaporating outlet on the fourth side. Lateral evaporation of the colloidal dispersion leads to periodic "stick-slip" receding of the meniscus (evaporative front), as triggered by the "coffee-ring" effect, promoting the assembly of silica NPs into periodic parallel stripes. The morphology of stripes can be well controlled by tailoring process variables such as substrate wettability, NP concentration, temperature, and gap height, etc. Furthermore, arrayed patterns of nanopillars or nanoholes are generated on a silicon wafer using the as-prepared colloidal stripes as an etching mask or template. Such arrayed patterns can reveal unique anisotropic wetting properties, which have a large contact angle hysteresis viewing from both the parallel and perpendicular directions in addition to a large wetting anisotropy.
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Affiliation(s)
- Xiangmeng Li
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University , Xi'an, Shaanxi 710049, China
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