| Texto completo | |
| Autor(es): |
Correia, Rebeca F. B. de O.
;
Sampaio, Aline G.
;
Milhan, Noala V. M.
;
Capote, Ariel
;
Gerdes, Holger
;
Lachmann, Kristina
;
Trava-Airoldi, Vladimir J.
;
Koga-Ito, Cristiane Yumi
;
Bandorf, Ralf
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A; v. 41, n. 3, p. 17-pg., 2023-05-01. |
| Resumo | |
DLC films were grown with Zn via a combined plasma-enhanced chemical vapor deposition (PECVD) and high-power impulse magnetron sputtering (HIPIMS) process. The films were deposited on textiles in an atmosphere of Ar and C2H2, and the percentage of metal in the DLC was varied by controlling the acetylene gas flow. At first, to evaluate the antimicrobial activity, a screening test with the ISO 22196 standard was carried out. Afterward, AATCC TM100:2019 was used to evaluate the antimicrobial effectiveness of the films on textiles. The antimicrobial effectiveness of the coating was studied against a Gram-negative bacterium (Escherichia coli), a Gram-positive bacterium (Staphylococcus aureus), and a fungus (Candida albicans), after a 24 h contact. In addition, the cytotoxicity of the samples to mammalian cells was evaluated by indirect contact. For this, the samples were soaked into the growth media for 1 and 7 days, and then, the extracts were collected and put in contact with keratinocytes for 24 h. Finally, the properties of the films were also evaluated as a function of the Zn content, such as their structural quality, morphology, hardness, wear resistance, and coefficient of friction. The films showed excellent results against all microorganisms, with 100% effectiveness in some cases. The pure extracts obtained from all the samples with the incorporation of metals were cytotoxic. Despite that, the cell viability after contact with some Zn-DLC diluted extracts (10%) was not different from that observed in the uncoated group. Besides, increasing the Zn content resulted in a film with poorer mechanical properties but did not affect the coefficient of friction of the coating. (AU) | |
| Processo FAPESP: | 19/25652-7 - Aplicação do plasma de baixa temperatura sob pressão atmosférica como adjuvante ao tratamento da Mucosite Oral |
| Beneficiário: | Aline da Graça Sampaio |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/15857-1 - Estudos científicos e aplicações inovadoras em diamante-CVD, Diamond-Like Carbon (DLC) e carbono nanoestruturado, obtidos por deposição química na fase vapor |
| Beneficiário: | Vladimir Jesus Trava-Airoldi |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 17/08899-3 - Filmes de DLC em multicamadas com nanopartículas condutora elétrica para aplicações espaciais e industriais |
| Beneficiário: | Rebeca Falcão Borja de Oliveira Correia |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 20/12450-4 - Propriedades elétricas e piezoresistivas de filmes de DLC com nanopartículas condutoras para aplicações como um material sensor em extensômetros em estruturas espaciais |
| Beneficiário: | Rebeca Falcão Borja de Oliveira Correia |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |
| Processo FAPESP: | 21/00046-7 - Associação do L-ácido ascórbico e do plasma frio em pressão atmosférica no tratamento da candidose bucal: avaliação in vitro e in vivo |
| Beneficiário: | Noala Vicensoto Moreira Milhan |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |