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Open AccessArticle

Novel Antimicrobial Titanium Dioxide Nanotubes Obtained through a Combination of Atomic Layer Deposition and Electrospinning Technologies

1
Food Packaging Laboratory (Laben-Chile), Department of Science and Food Technology, Faculty of Technology, Universidad de Santiago de Chile (USACH), Obispo Umaña 050, 9170201 Santiago, Chile
2
Center for the Development of Nanoscience and Nanotechnology (CEDENNA), 9170124 Santiago, Chile
3
Department of Basic Sciences, Engineering Faculty, CIDES, Universidad Central de Chile, Santa Isabel 1186, 8330601 Santiago, Chile
4
Department of Physics, Universidad de Santiago de Chile (USACH), Av. Ecuador 3493, 9170124 Santiago, Chile
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(2), 128; https://doi.org/10.3390/nano8020128
Received: 23 December 2017 / Revised: 10 February 2018 / Accepted: 13 February 2018 / Published: 24 February 2018
The search for new antimicrobial substances has increased in recent years. Antimicrobial nanostructures are one of the most promising alternatives. In this work, titanium dioxide nanotubes were obtained by an atomic layer deposition (ALD) process over electrospun polyvinyl alcohol nanofibers (PVN) at different temperatures with the purpose of obtaining antimicrobial nanostructures with a high specific area. Electrospinning and ALD parameters were studied in order to obtain PVN with smallest diameter and highest deposition rate, respectively. Chamber temperature was a key factor during ALD process and an appropriate titanium dioxide deposition performance was achieved at 200 °C. Subsequently, thermal and morphological analysis by SEM and TEM microscopies revealed hollow nanotubes were obtained after calcination process at 600 °C. This temperature allowed complete polymer removal and influenced the resulting anatase crystallographic structure of titanium dioxide that positively affected their antimicrobial activities. X-ray analysis confirmed the change of titanium dioxide crystallographic structure from amorphous phase of deposited PVN to anatase crystalline structure of nanotubes. These new nanostructures with very large surface areas resulted in interesting antimicrobial properties against Gram-positive and Gram-negative bacteria. Titanium dioxide nanotubes presented the highest activity against Escherichia coli with 5 log cycles reduction at 200 μg/mL concentration. View Full-Text
Keywords: nanotechnology; atomic layer deposition; electrospinning; titanium dioxide nanotubes; antimicrobial nanotechnology; atomic layer deposition; electrospinning; titanium dioxide nanotubes; antimicrobial
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MDPI and ACS Style

López de Dicastillo, C.; Patiño, C.; Galotto, M.J.; Palma, J.L.; Alburquenque, D.; Escrig, J. Novel Antimicrobial Titanium Dioxide Nanotubes Obtained through a Combination of Atomic Layer Deposition and Electrospinning Technologies. Nanomaterials 2018, 8, 128. https://doi.org/10.3390/nano8020128

AMA Style

López de Dicastillo C, Patiño C, Galotto MJ, Palma JL, Alburquenque D, Escrig J. Novel Antimicrobial Titanium Dioxide Nanotubes Obtained through a Combination of Atomic Layer Deposition and Electrospinning Technologies. Nanomaterials. 2018; 8(2):128. https://doi.org/10.3390/nano8020128

Chicago/Turabian Style

López de Dicastillo, Carol; Patiño, Cristian; Galotto, María J.; Palma, Juan L.; Alburquenque, Daniela; Escrig, Juan. 2018. "Novel Antimicrobial Titanium Dioxide Nanotubes Obtained through a Combination of Atomic Layer Deposition and Electrospinning Technologies" Nanomaterials 8, no. 2: 128. https://doi.org/10.3390/nano8020128

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