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Polymers
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Conjugated Polymers and /or Oligomers for Organic Electronics and Biological...
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Conjugated Polymers and /or Oligomers for Organic Electronics and Biological Applications

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Physics and Theory".

Deadline for manuscript submissions: closed (5 July 2023) | Viewed by 5992

Special Issue Editor

Dr. Mohammad Afsar Uddin

E-Mail Website1 Website2
Guest Editor
Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA
Interests: π-conjugated oligomer; polymer; polyelectrolytes; organic light-emitting diodes (OLEDs); organic photovoltaic cells (OPV); organic field-effect transistor (OFET); electrochromic devices; photodetectors; photocatalyst; rewritable paper; redox flow batteries; bioelectronics; biosensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Conjugated organic molecules (CPs) have delocalized π-electrons along a molecular backbone, making them intrinsically semi-conducting. Tunable electrical and optical properties indicate potential applications in organic opto-electronic devices, such as organic light-emitting diodes (OLEDs), organic photovoltaic cells (OPV), polymer laser, organic field-effect transistors (OFETs), electrochromic devices, photodetectors, photocatalysts, rewritable paper, redox flow batteries, etc. Introducing ionic side chains makes CPs water soluble and biocompatible. This advantage makes CPs a sensing platform (via the molecular wire effect) for the detection of various bimolecular targets, such as nucleic acids, proteins, heparins, metal ions, and bacteria through fluorescence and/or electrochemical sensors. CPs are also used for near-infrared markers (or probes) for in vivo and in vitro biological fluorescence imaging.

This Special Issue on “Conjugated Polymers and/or Oligomers for Organic Electronics and Biological Applications” of the journal Polymers seeks contributions to assess the state of the art and future developments in the research area of conjugated organic molecules (CPs). Topics include but are not limited to the synthesis, characterization, and/or unique application of conjugated oligomers/oligo electrolytes and/or polymers/polymers electrolytes. Authors are invited to submit their latest results. Both original papers and reviews are welcome.

We look forward to receiving your outstanding work for this Special Issue.

Dr. Mohammad Afsar Uddin
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • conjugated organic molecules
  • polymers
  • opto-electronic devices (OLED, OPV, OFET, photodetectors, redox flow batteries etc.)
  • bioelectronics
  • biosensors
  • photocatalyst
  • smart ink/rewritable paper

Published Papers (2 papers)

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Research

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29 pages, 5741 KiB  
Article
Structural, Optical, and Electrical Investigations of Nd2O3-Doped PVA/PVP Polymeric Composites for Electronic and Optoelectronic Applications
by Samer H. Zyoud, Ali Almoadi, Thekrayat H. AlAbdulaal, Mohammed S. Alqahtani, Farid A. Harraz, Mohammad S. Al-Assiri, Ibrahim S. Yahia, Heba Y. Zahran, Mervat I. Mohammed and Mohamed Sh. Abdel-wahab
Polymers 2023, 15(6), 1351; https://doi.org/10.3390/polym15061351 - 8 Mar 2023
Cited by 21 | Viewed by 2456
Abstract
In this present work, a PVA/PVP-blend polymer was doped with various concentrations of neodymium oxide (PB-Nd+3) composite films using the solution casting technique. X-ray diffraction (XRD) analysis was used to investigate the composite structure and proved the semi-crystallinity of the pure [...] Read more.
In this present work, a PVA/PVP-blend polymer was doped with various concentrations of neodymium oxide (PB-Nd+3) composite films using the solution casting technique. X-ray diffraction (XRD) analysis was used to investigate the composite structure and proved the semi-crystallinity of the pure PVA/PVP polymeric sample. Furthermore, Fourier transform infrared (FT-IR) analysis, a chemical-structure tool, illustrated a significant interaction of PB-Nd+3 elements in the polymeric blends. The transmittance data reached 88% for the host PVA/PVP blend matrix, while the absorption increased with the high dopant quantities of PB-Nd+3. The absorption spectrum fitting (ASF) and Tauc’s models optically estimated the direct and indirect energy bandgaps, where the addition of PB-Nd+3 concentrations resulted in a drop in the energy bandgap values. A remarkably higher quantity of Urbach energy for the investigated composite films was observed with the increase in the PB-Nd+3 contents. Moreover, seven theoretical equations were utilized, in this current research, to indicate the correlation between the refractive index and the energy bandgap. The indirect bandgaps for the proposed composites were evaluated to be in the range of 5.6 eV to 4.82 eV; in addition, the direct energy gaps decreased from 6.09 eV to 5.83 eV as the dopant ratios increased. The nonlinear optical parameters were influenced by adding PB-Nd+3, which tended to increase the values. The PB-Nd+3 composite films enhanced the optical limiting effects and offered a cut-off laser in the visible region. The real and imaginary parts of the dielectric permittivity of the blend polymer embedded in PB-Nd+3 increased in the low-frequency region. The AC conductivity and nonlinear I-V characteristics were augmented with the doping level of PB-Nd+3 contents in the blended PVA/PVP polymer. The outstanding findings regarding the structural, electrical, optical, and dielectric performance of the proposed materials show that the new PB-Nd+3-doped PVA/PVP composite polymeric films are applicable in optoelectronics, cut-off lasers, and electrical devices. Full article
(This article belongs to the Special Issue Conjugated Polymers and /or Oligomers for Organic Electronics and Biological Applications)
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Review

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21 pages, 2354 KiB  
Review
The Bioanalytical and Biomedical Applications of Polymer Modified Substrates
by Guifeng Liu, Xudong Sun, Xiaodong Li and Zhenxin Wang
Polymers 2022, 14(4), 826; https://doi.org/10.3390/polym14040826 - 21 Feb 2022
Cited by 11 | Viewed by 2676
Abstract
Polymers with different structures and morphology have been extensively used to construct functionalized surfaces for a wide range of applications because the physicochemical properties of polymers can be finely adjusted by their molecular weights, polydispersity and configurations, as well as the chemical structures [...] Read more.
Polymers with different structures and morphology have been extensively used to construct functionalized surfaces for a wide range of applications because the physicochemical properties of polymers can be finely adjusted by their molecular weights, polydispersity and configurations, as well as the chemical structures and natures of monomers. In particular, the specific functions of polymers can be easily achieved at post-synthesis by the attachment of different kinds of active molecules such as recognition ligand, peptides, aptamers and antibodies. In this review, the recent advances in the bioanalytical and biomedical applications of polymer modified substrates were summarized with subsections on functionalization using branched polymers, polymer brushes and polymer hydrogels. The review focuses on their applications as biosensors with excellent analytical performance and/or as nonfouling surfaces with efficient antibacterial activity. Finally, we discuss the perspectives and future directions of polymer modified substrates in the development of biodevices for the diagnosis, treatment and prevention of diseases. Full article
(This article belongs to the Special Issue Conjugated Polymers and /or Oligomers for Organic Electronics and Biological Applications)
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