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Polydopamine Nanomaterials: Synthesis and Applications
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Polydopamine Nanomaterials: Synthesis and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (15 April 2022) | Viewed by 9863

Special Issue Editors

Dr. Daniel Hauser

E-Mail Website
Guest Editor
Division of Surgery & Interventional Science, University College London, London NW3 2QG, UK
Interests: nanomaterials; cell culture techniques; laser scanning microscopy; polydopamine; protein nanoparticles for use in lung cancer therapy
Prof. Dr. Vincent Ball

E-Mail Website
Guest Editor
1. Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
2. Institut National de la Santé et de la Recherche Médicale, Unité mixte de rechere 1121, CEDEX, Strasbourg, France
Interests: polydopamine coatings; electrodeposition; surface characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the last ten years, polydopamine and similar materials produced from the oxidation of catecholamines have revolutionized surface science as versatile coatings able to coat the surface of any kind of material with a conformal and easy-to-functionalize coating. However, the chemistry leading to such coatings of controllable thickness and wettability, tuned by the nature of the used oxidant and the reaction time, also occurs in solution, leading to a huge loss of material in the form of an insoluble and useless precipitate. Owing to the eumelanin-like properties of polydopamine, recent efforts were devoted to control the self-assembly pathway(s) leading to a variety of applications ranging from a solar thermal fluid dopant to a suitable building block material for theranostic systems. Even though the polydopamine field has successfully produced a variety of applications, many aspects of its fundamental properties, as well as additional appliances, remain a subject of active investigation. This Special Issue aims to cover the fundamental aspects as well as the applications of such bio-inspired, easy-to-produce nanomaterials.

Dr. Daniel Hauser
Prof. Dr. Vincent Ball
Guest Editors

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Keywords

  • Polydopamine
  • Nanostructures
  • Bioinspiration
  • Proteins
  • Templating agents
  • Biomedical applications and energy conversion
  • Catecholamines
  • Polydopamine synthesis
  • Nanomedicine

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Published Papers (3 papers)

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Research

15 pages, 6549 KiB  
Article
Strongly Adhesive and Antimicrobial Peptide-Loaded, Alginate–Catechol-Based Gels for Application against Periimplantitis
by Sébastien Baixe, Vincent Ball, Loïc Jierry, Sarah Cianférani, Jean-Marc Strub, Youssef Haikel, Marie-Hélène Metz-Boutigue and Olivier Etienne
Appl. Sci. 2021, 11(21), 10050; https://doi.org/10.3390/app112110050 - 27 Oct 2021
Cited by 3 | Viewed by 2794
Abstract
Background: Periimplantitis is a disease linked to oral virulent bacteria such as P. gingivalis that grow in dental implants surrounding tissues and between implants and abutments. Antimicrobial gels previously described to fill these sites lose their effectiveness and resorb over time. Objective: Characterization [...] Read more.
Background: Periimplantitis is a disease linked to oral virulent bacteria such as P. gingivalis that grow in dental implants surrounding tissues and between implants and abutments. Antimicrobial gels previously described to fill these sites lose their effectiveness and resorb over time. Objective: Characterization of biophysical and antimicrobial properties of an original hydrogel, Alginate–Catechol (Alg–Cat), combined to D-Cateslytin (D-CTL). Methods: Gelation kinetics, frequency and strain sweep measurements were performed by rheology. Antibacterial activity of the gels was tested against P. gingivalis, and the MIC was determined. Peptides released from the gels were purified by HPLC and characterized by MALDI–TOF mass spectrometry. The behavior of bacteria in contact with the gel was observed using optical and electronic microscopy (SEM and TEM). Results: Gelation was fast and was achieved in 2 min with a storage modulus between 25 and 30 Pa. The gels were stable under strain and showed an adhesive potential reinforced with aging at 18 h (5.4 kPa) under a slow retraction speed (4 J·m−2 at 10 µm/s) with a mixed rupture profile (adhesive/cohesive). The MIC of D-CTL inside the Alg–Cat gel against P. gingivalis was equal to 470 µg·mL−1 after 24 h. Peptides recovered in the supernatant and inside the gel were fragmented, most of them conserving the ⍺-helix active site. No bacteria were visualized at the surface and inside the gel after 24 h. This gel is promising for clinical application for the prevention of periimplantitis. Full article
(This article belongs to the Special Issue Polydopamine Nanomaterials: Synthesis and Applications)
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11 pages, 3122 KiB  
Article
Effects of Glutathione Diminishment on the Immune Responses against Mycobacterium tuberculosis Infection
by Ruoqiong Cao, Afsal Kolloli, Ranjeet Kumar, James Owens, Kayvan Sasaninia, Charles Vaughn, Mohkam Singh, Edward Truong, Nala Kachour, Abrianna Beever, Wael Khamas, Selvakumar Subbian and Vishwanath Venketaraman
Appl. Sci. 2021, 11(17), 8274; https://doi.org/10.3390/app11178274 - 6 Sep 2021
Cited by 6 | Viewed by 3642
Abstract
Mycobacterium tuberculosis (M. tb), the causative agent of tuberculosis (TB), continues to be a global health burden. We have reported that patients with marked deficiency in the production of glutathione (GSH) had impaired granulomatous effector responses against M. tb infection, which were [...] Read more.
Mycobacterium tuberculosis (M. tb), the causative agent of tuberculosis (TB), continues to be a global health burden. We have reported that patients with marked deficiency in the production of glutathione (GSH) had impaired granulomatous effector responses against M. tb infection, which were restored when supplementing patients with liposomal GSH (lGSH). However, the effects of GSH deficiency in the lung parenchyma in altering granuloma formation and effector responses against M. tb infection remain unexplored. We aim to elucidate the effects of diethyl maleate (DEM)-induced GSH deficiency during an active M. tb infection in an in vivo mouse model. We assessed for total and reduced GSH levels, malondialdehyde (MDA) levels, cytokine profiles, granuloma formation and M. tb burden. DEM administration significantly diminished total and reduced GSH levels in the lungs and plasma and increased MDA levels in infected mice compared to sham-treated controls. DEM treatment was also associated with an increase in IL-6, TNF-α and ill-formed granulomas in infected mice. Furthermore, M. tb survival was significantly increased along with a higher pulmonary and extrapulmonary bacterial load following DEM treatment. Overall, GSH deficiency led to increased oxidative stress, impaired granuloma response, and increased M. tb survival in infected mice. These findings can provide insight into how GSH deficiency can interfere with the control of M. tb infection and avenues for novel therapeutic approaches. Full article
(This article belongs to the Special Issue Polydopamine Nanomaterials: Synthesis and Applications)
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15 pages, 5792 KiB  
Article
Polydopamine-Mediated Ag and ZnO as an Active and Recyclable SERS Substrate for Rhodamine B with Significantly Improved Enhancement Factor and Efficient Photocatalytic Degradation
by Hsien-Kuo Chin, Pei-Ying Lin, Jyunde Chen, Rajendranath Kirankumar, Zhi-Hong Wen and Shuchen Hsieh
Appl. Sci. 2021, 11(11), 4914; https://doi.org/10.3390/app11114914 - 27 May 2021
Cited by 9 | Viewed by 2731
Abstract
We demonstrate the development of an active multicomponent Ag/PDA/ZnO@GMF surface-enhanced Raman scattering (SERS) substrate via introducing bio-inspired polydopamine (PDA) in between a noble metal (AgNPs) and ZnO nanorods. The insertion of PDA enabled efficient charge redistribution between metal and semiconductor through their aromatic [...] Read more.
We demonstrate the development of an active multicomponent Ag/PDA/ZnO@GMF surface-enhanced Raman scattering (SERS) substrate via introducing bio-inspired polydopamine (PDA) in between a noble metal (AgNPs) and ZnO nanorods. The insertion of PDA enabled efficient charge redistribution between metal and semiconductor through their aromatic cores. The substrate exhibited a high enhancement factor (EF) of 1010 for the organic pollutant dye Rhodamine B (RhB). Subsequent exposure of a RhB-loaded substrate to an external UV light source developed an efficient pathway for RhB degradation and replenished the substrate for multiple usage cycles with remarkable photostability. Thus, enhanced performance of the substrate in terms of light-harvesting capability and high charge-separation efficiency was observed. In addition, the much larger surface area of the branched ZnO nanostructures served as a template for PDA assisted synthesis and controlled deposition of AgNPs, which further improved the SERS effect. Our work seeks to understand the contributions of the noble metal and semiconductor components and the synergistic effects of combining them with a facile charge transport medium to enable the fabrication of highly efficient SERS substrates for use in industrial and environmental applications. Full article
(This article belongs to the Special Issue Polydopamine Nanomaterials: Synthesis and Applications)
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