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1D Titanium Dioxide: Achievements in Chemical Sensing.

ABSTRACT: For the last two decades, titanium dioxide (TiO2) has received wide attention in several areas such as in medicine, sensor technology and solar cell industries. TiO2‑based gas sensors have attracted significant attention in past decades due to their excellent physical/chemical properties, low cost and high abundance on Earth. In recent years, more and more efforts have been invested for the further improvement in sensing properties of TiO2 by implementing new strategies such as growth of TiO2 in different morphologies. Indeed, in the last five to seven years, 1D nanostructures and heterostructures of TiO2 have been synthesized using different growth techniques and integrated in chemical/gas sensing. Thus, in this review article, we briefly summarize the most important contributions by different researchers within the last five to seven years in fabrication of 1D nanostructures of TiO2‑based chemical/gas sensors and the different strategies applied for the improvements of their performances. Moreover, the crystal structure of TiO2, different fabrication techniques used for the growth of TiO2‑based 1D nanostructures, their chemical sensing mechanism and sensing performances towards reducing and oxidizing gases have been discussed in detail.

SUBMITTER: Kaur N

PROVIDER: S-EPMC7372330 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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1D Titanium Dioxide: Achievements in Chemical Sensing.

Kaur Navpreet N Singh Mandeep M Moumen Abderrahim A Duina Giorgio G Comini Elisabetta E

Materials (Basel, Switzerland) 20200703 13

For the last two decades, titanium dioxide (TiO2) has received wide attention in several areas such as in medicine, sensor technology and solar cell industries. TiO2‑based gas sensors have attracted significant attention in past decades due to their excellent physical/chemical properties, low cost and high abundance on Earth. In recent years, more and more efforts have been invested for the further improvement in sensing properties of TiO2 by implementing new str ...[more]

PMID: 32635229

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Project description:Interventions: This study is a cross-over design, including only healthy volunteers. A cross-over design was chosen because it is the most appropriate design for this study: it will reduce the individual differences by allowing every subject to be his own control. This study will be done in 4 weeks and include 2 periods. The volunteers will be randomized in two groups: one group will start with the intervention period and the other one will start with the control period. After, these 2 weeks of intervention or control periods, the volunteers will start the control period and intervention period respectively for another 2 weeks. The time of exposure is 2 weeks. Indeed, it takes 5 to 7 days for the turnover of the epithelial cells in the gut. This will ensure the exposure of all the cells of the luminal surface of the colon. The control period, is meant to reduce to a minimum the ingestion of E171 in order to have all the volunteers to start the same level of E171. During this period the volunteers will receive a list of products to avoid like cookies, chewing gum, certain toothpaste that are known to contain a significant amount of E171. The intervention period, is meant to control the amount of E171 that the volunteers will ingest. A concentration, 0.82 mg/kg bw/day, corresponding to a normal daily consumption will be given to the volunteers. The quantity will be adjusted to the body weight and dispersed in yoghurt that will be eaten at breakfast, lunch and dinner. In order to verify the compliance of the subjects, once in every period the subjects will prepare a package that include exactly what they ate and drank all day. This food package will be mixed and tested for TiO2 content. Primary outcome(s): The primary outcome parameters are differences in transcriptomic markers after consumption of food additive E171. These outcomes in humans will shed light on the relevance of markers identified in preclinical studies, and how the animal data on the risk of facilitation of tumour growth can be extrapolated to humans Study Design: Randomized controlled trial, Single blinded (masking used), N/A , unknown, Crossover

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1D Titanium Dioxide: Achievements in Chemical Sensing.

Publications

1D Titanium Dioxide: Achievements in Chemical Sensing.

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