Comparison of the surface properties of <scp>DLC</scp> and ultrananocrystalline diamond films with respect to their bio‐applications

Jelínek, M.; Voss, Alexandra; Kocourek, T.; Mozafari, Mahsa; Vymetalová, Veronika; Zezulová, Marketa; Písařík, Petr; Kotzianová, Adéla; Popov, C.; Mikšovský, Jan

doi:10.1002/pssa.201228713

Cited by 13 publications

(12 citation statements)

References 14 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The bactericidal efficacy of DLC films is critically associated with their surface profile, including high smoothness, high dispersive component of the surface energy and hydrophobicity [ 154 ]. In particular, strong hydrophobicity of DLC may cause variations of the bacterial cell membrane and lead to the biological death [ 155 ].…”

Section: Fullerenementioning

confidence: 99%

Review on the Antimicrobial Properties of Carbon Nanostructures

et al. 2017

View full text Add to dashboard Cite

Swift developments in nanotechnology have prominently encouraged innovative discoveries across many fields. Carbon-based nanomaterials have emerged as promising platforms for a broad range of applications due to their unique mechanical, electronic, and biological properties. Carbon nanostructures (CNSs) such as fullerene, carbon nanotubes (CNTs), graphene and diamond-like carbon (DLC) have been demonstrated to have potent broad-spectrum antibacterial activities toward pathogens. In order to ensure the safe and effective integration of these structures as antibacterial agents into biomaterials, the specific mechanisms that govern the antibacterial activity of CNSs need to be understood, yet it is challenging to decouple individual and synergistic contributions of physical, chemical and electrical effects of CNSs on cells. In this article, recent progress in this area is reviewed, with a focus on the interaction between different families of carbon nanostructures and microorganisms to evaluate their bactericidal performance.

show abstract

Section: Fullerenementioning

confidence: 99%

Review on the Antimicrobial Properties of Carbon Nanostructures

et al. 2017

View full text Add to dashboard Cite

show abstract

“…DLC coatings have attracted great attention from the biomaterials community because they impart biocompatibility, chemical inertness, a low friction coefficient, high hardness, wear and corrosion resistance to medical device surfaces [ 85 , 86 ]. DLC consists of amorphous carbon and/or carbon crystallites and possesses a disordered structure with a mixture of sp 2 and sp 3 hybridized carbon [ 87 ] ( Figure 5 a). Depending on the sp 2 /sp 3 ratio, the properties of DLC can vary significantly.…”

Section: Inherent Antibacterial Properties Of Carbon Nanomaterialsmentioning

confidence: 99%

“…Both ultrananocrystalline diamond films and DLC exhibit strong antibacterial properties [ 85 , 87 , 88 , 89 ] ( Figure 5 b). Nanocrystalline diamond surfaces with larger crystallite sizes than DLC or UNCD also show bactericidal and anti-adhesive properties [ 90 , 91 , 92 ], but bacteria toxicity disappears if the crystallites are in the micrometer range [ 92 ].…”

Section: Inherent Antibacterial Properties Of Carbon Nanomaterialsmentioning

confidence: 99%

“…Nanocrystalline diamond surfaces with larger crystallite sizes than DLC or UNCD also show bactericidal and anti-adhesive properties [ 90 , 91 , 92 ], but bacteria toxicity disappears if the crystallites are in the micrometer range [ 92 ]. Jelinek et al compare UNCD and DLC films with varying sp 3 content showing that all those materials exhibit high antibacterial activity ( Figure 4 ) [ 87 ]. Since DLC films are extremely smooth, interfacial roughness or sharp features (as in graphene films) are not important parameters for the antibacterial properties [ 88 ].…”

Section: Inherent Antibacterial Properties Of Carbon Nanomaterialsmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Nanomaterials as Antibacterial Colloids

Maas

2016

Materials

100

View full text Add to dashboard Cite

Carbon nanomaterials like graphene, carbon nanotubes, fullerenes and the various forms of diamond have attracted great attention for their vast potential regarding applications in electrical engineering and as biomaterials. The study of the antibacterial properties of carbon nanomaterials provides fundamental information on the possible toxicity and environmental impact of these materials. Furthermore, as a result of the increasing prevalence of resistant bacteria strains, the development of novel antibacterial materials is of great importance. This article reviews current research efforts on characterizing the antibacterial activity of carbon nanomaterials from the perspective of colloid and interface science. Building on these fundamental findings, recent functionalization strategies for enhancing the antibacterial effect of carbon nanomaterials are described. The review concludes with a comprehensive outlook that summarizes the most important discoveries and trends regarding antibacterial carbon nanomaterials.

show abstract

“…Hoje, o design end-hall é utilizado em outras funções, agindo como um canhão de íons em aplicações e processos de engenharia de superfícies, tais como limpeza, etching e assistência em deposição de filmes finos em substratos [25,26].…”

Section: Introductionunclassified

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

Fontoura¹,

Wanke²,

Aguzzoli³

2017

Sci. cum Ind.

View full text Add to dashboard Cite

ResumoA modificação de superfícies é uma técnica que a engenharia tem feito uso há muito tempo, para melhoria de propriedades em materiais. O poli metil-metacrilato (PMMA), por ser um material de constante uso em aplicações biomédicas, exige que sua superfície apresente características favoráveis à adesão celular e compatibilidade com tecidos. Os polímeros, de uma maneira geral, quando submetidos a tratamentos em plasma, tendem a formar grupos funcionais que alteram propriedades ópticas, químicas, físicas e de biocompatibilidade. Em função disso, este trabalho propôs realizar a funcionalização de substratos de PMMA através da fonte de íons Kaufman. Amostras de PMMA foram submetidas ao feixe de íons de nitrogênio gerado pela fonte Kaufman, em diversas condições. A caracterização foi feita pelas técnicas de GD-OES, FTIR e EDS. Ficou comprovado, através do perfil de concentração de nitrogênio obtido por GD-OES, que a quantidade de nitrogênio na superfície aumenta gradativamente com o tempo de implantação e a potência. Outro indício foi a análise em FTIR, que mostrou presença de aminas nas faixas entre 1654-655 cm -1 e 3300-3700 cm -1 . A análise em EDS, porém, comprovou também a presença de ferro e cromo, agentes citotóxicos, que precisam ser eliminados para a continuidade dos trabalhos. Palavras-chaveImplantação de íons de nitrogênio, fonte de íons Kaufman, modificação superficial de PMMA Implantation of Nitrogen Ions through a Kaufman Ion Source AbstractSurface modification is a technique that engineering has been using for a long time, in order to improve the properties of materials. Poly (methyl methacrylate) (PMMA), for being a material of constant use in biomedical applications, demands that its surface offers favorable characteristics in cell adhesion and tissue compatibility. Polymers, generally speaking, when submitted to plasma treatments, tend to form functional groups that alter optical, chemical, physical and biocompatibility properties. Taking all of this into consideration, this work proposed to functionalize PMMA substrates through a Kaufman ion source. PMMA samples were submitted to a nitrogen ion beam generated through the Kaufman source, in different conditions. Characterization was carried out by the techniques of GD-OES, FTIR and EDS. It was proved, through nitrogen concentration profile obtained by GD-OES, that the amount of nitrogen in the surface increased gradually with implantation time and supplied power. The FTIR analysis was another evidence of nitrogen presence, as amines were detected in the bands between 1654-655 cm -1 and 3300-3700 cm -1 . The EDS analysis, though, proved that iron and chromium, cytotoxic agents, are also present and therefore, they must be eliminated from the process, so that future studies can be carried out.

show abstract

Comparison of the surface properties of DLC and ultrananocrystalline diamond films with respect to their bio‐applications

Cited by 13 publications

References 14 publications

Review on the Antimicrobial Properties of Carbon Nanostructures

Review on the Antimicrobial Properties of Carbon Nanostructures

Carbon Nanomaterials as Antibacterial Colloids

Implantação de Íons de Nitrogênio em PMMA Através de uma Fonte Kaufman

Contact Info

Product

Resources

About