Titania as a driving agent for DHICA polymerization: a novel strategy for the design of bioinspired antimicrobial nanomaterials

Vitiello, Giuseppe; Pezzella, Alessandro; Varcamonti, Mario; Silvestri, Brigida; Costantini, A.; Branda, F.; Luciani, Giuseppina

doi:10.1039/c5tb00039d

Cited by 37 publications

(35 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…37 The characteristic spectrum of the persistent radical, which is a hallmark of all melanins, is visible in samples with less than 2% iron. As reported, paramagnetic metals can reduce the amplitude of this peak, 38 completely suppressing it at high loadings.…”

Section: Resultsmentioning

confidence: 99%

Structure and Function of Iron-Loaded Synthetic Melanin

Xie²,

Wang³

et al. 2016

ACS Nano

132

139

View full text Add to dashboard Cite

We describe a synthetic method for increasing and controlling the iron loading of synthetic melanin nanoparticles and use the resulting materials to perform a systematic quantitative investigation on their structure–property relationship. A comprehensive analysis by magnetometry, electron paramagnetic resonance, and nuclear magnetic relaxation dispersion reveals the complexities of their magnetic behavior and how these intraparticle magnetic interactions manifest in useful material properties such as their performance as MRI contrast agents. This analysis allows predictions of the optimal iron loading through a quantitative modeling of antiferromagnetic coupling that arises from proximal iron ions. This study provides a detailed understanding of this complex class of synthetic biomaterials and gives insight into interactions and structures prevalent in naturally occurring melanins.

show abstract

Section: Resultsmentioning

confidence: 99%

Structure and Function of Iron-Loaded Synthetic Melanin

Xie²,

Wang³

et al. 2016

ACS Nano

132

139

View full text Add to dashboard Cite

show abstract

“…In case of experiments with methylene blue where the exponential decrease of the dye concentration is visible, the exponential Equation (5) can be applied whereas such procedure for the acetone degradation process would be a form of rashness. Thus, a linear Equation (6) has been used instead to avoid too uncertain conclusions.…”

Section: Kinetic Calculationsmentioning

confidence: 99%

“…The studies on titanium dioxide and the materials produced on its basis are a good example of the efforts to determine the impact of individual structural and morphological parameters on properties and application possibilities of modern materials. TiO 2 materials and nanomaterials, now are often used in various applications, such as self-cleaning surfaces [1][2][3], anti-fogging mirrors [4,5], antimicrobial coatings, [6][7][8][9] electrochromic devices [10][11][12], rechargeable batteries [13,14], and sensors [15,16]. They can also be applied in medicine [17][18][19][20], automotive [21,22], and in photocatalytic environmental cleaning of water and air [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Nanostructured Titania Films Obtained by Electrochemical, Chemical, and Thermal Oxidation of Ti6Al4V Alloy—Comparative Analysis

Radtke

2019

Catalysts

View full text Add to dashboard Cite

Three different Ti6Al4V surface oxidation methods have been applied to obtain three types of titania materials of different nanoarchitecture. Electrochemical oxidation of titanium alloy allowed for obtaining titania nanotubes (TNT), chemical oxidation led to obtain titania nanofibers (TNF), and thermal oxidation gave titania nanowires (TNW). My earlier investigations of these nanomaterials were focused mainly on the estimation of their bioactivity and potential application in modern implantology. In this article, the comparative analysis of the photocatalytic activity of produced systems, as well as the impact of their structure and morphology on this activity, are discussed. The activity of studied nanomaterials was estimated basis of UV-induced degradation of methylene blue and also acetone, and it was determined quantitatively according to the Langmuir–Hinshelwood reaction mechanism. The obtained results were compared to the activity of Pilkington Glass ActivTM (reference sample). Among analyzed systems, titania nanofibers obtained at 140 and 120 °C, possessing anatase and anatase/amorphous structure, as well as titania nanowires obtained at 475 and 500 °C, possessing anatase and anatase/rutile structure, were better photocatalyst than the reference sample. Completely amorphous titania nanotubes, turned out to be an interesting alternative for photocatalytic materials in the form of thin films, however, their photocatalytic activity is lower than for Pilkington Glass ActivTM.

show abstract

“…[128] Melanin is used in cosmetic products, sometimes in combination with photoactive oxides. Melanin (both synthetic and natural)-TiO 2 interactions have been investigated, [129][130][131] in particular the photocatalytic activity of TiO 2 on the process of DHICA polymerization (Fig. 7).…”

Section: Melanin/metal Oxides Interfaces: Adhesion Biocompatibilitymentioning

confidence: 99%

Natural melanin pigments and their interfaces with metal ions and oxides: emerging concepts and technologies

Mauro

Soliveri

et al. 2017

MRS Communications

View full text Add to dashboard Cite

Melanin (from the Greek μέλας, mélas, black) is a biopigment ubiquitous in flora and fauna, featuring broadband optical absorption, hydration-dependent electrical response, ion-binding affinity as well as antioxidative and radical-scavenging properties. In the human body, photoprotection in the skin and ion flux regulation in the brain are some biofunctional roles played by melanin. Here we discuss the progress in melanin research that underpins emerging technologies in energy storage/conversion, ion separation/water treatment, sunscreens, and bioelectronics. The melanin research aims at developing approaches to explore natural materials, well beyond melanin, which might serve as a prototype benign material for sustainable technologies.

show abstract

Titania as a driving agent for DHICA polymerization: a novel strategy for the design of bioinspired antimicrobial nanomaterials

Abstract: Organic materials are widely employed to tune surface chemistry and/or as structuring agents of inorganic materials.

Cited by 37 publications

References 49 publications

Structure and Function of Iron-Loaded Synthetic Melanin

Structure and Function of Iron-Loaded Synthetic Melanin

Photocatalytic Activity of Nanostructured Titania Films Obtained by Electrochemical, Chemical, and Thermal Oxidation of Ti6Al4V Alloy—Comparative Analysis

Natural melanin pigments and their interfaces with metal ions and oxides: emerging concepts and technologies

Contact Info

Product

Resources

About