Search query: insulator metal oxide nanoparticles

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abstract: Abstract Residual pharmaceutical products from hospitals, pharmaceutical companies, animal farms, and through human excreta are deposited in wastewater and reach environmental niches instigating potential ecological toxicity, genotoxicity, and endocrine disruption. Antibiotics and other pharmaceutical products like analgesics and antiinflammatory drugs, contraceptives, beta blockers, lipid regulators, phenols, herbicides, pesticides, and neuroactive compounds may form highly toxic derivatives with chlorine in postchlorinated effluents. Their effects in low concentrations necessitate highly sensitive and specific techniques for their detection. Removal of the residual antibiotics and other pharmaceutical compounds in wastewater and water is beyond the capacities of conventional wastewater treatment plants (WWTPs) Metal oxides are able to form diverse oxide compounds, which due to their structural geometries can exhibit metallic, semiconductor, or insulator characteristics. Nanoscale metal oxides are promising alternative effective adsorbents for the removal of heavy metals, organic derivatives, and radionuclides. Ferric oxide nanomaterials (FO NM) like magnetite, maghemite, hematite, and nanoactivated carbon have been used for efficient removal of a range of other antibiotics from water including sulfamethoxazole as well as phenol and phenol related pharmaceuticals. The combination of iron oxide NM and biochars allows the removal of both pharmaceuticals and microbial contaminants and may become a cheap and effective removal process. The potential of zinc oxide nanoparticles (nZnO) and titanium dioxide nanoparticles (TiO2 NPs) has also been explored for the efficient removal of organic and inorganic pharmaceutical contaminants from wastewater. Doped metal oxide nanoparticles (MONs) are showing higher photocatalytic activity than undoped due to factors including small grain size, high crystallinity, high specific surface area, and decrease in the band gap energy. The doped MONs with additional metals can remove a wide range of pharmaceuticals and personal care products, as well as pathogens from water in a more effective way than the undoped ones, while doping with transition metal ions like Fe2+ Mn2+ Cu2+ Zn2+ among others has been appraised positively for best activity. Several advantages have been attributed to the use of NMs based on the cost implication, ease of use, and flexibility with an assurance of removal of toxic pharmaceutical nanocontaminants from water and the wastewater for reuse. The guidelines of the Inter organization Programme for the Sound Management of Chemicals (developed as a cooperative agreement of UNEP, ILO, FAO, WHO, UNIDO, UNITAR, and OECD) which contain reports, identification, risk, analysis, and preliminary guidance on the use of nanoparticles, should be considered in utilizing MON or any other NMs. This chapter will briefly overview the different types of metal oxides nanomaterials used for the monitoring/removal of the pharmaceutical compounds and personal care products (PPCPs) prevalent in wastewater. Further, the feasibility, challenges, and future perspective of the application of these MONs in the development of efficient wastewater treatment processes will be explored.
author_names: Anthony Ayodeji Adegoke

Thor Axel Stenstrom
title: Metal oxide nanoparticles in removing residual pharmaceutical products and pathogens from water and wastewater
year: 2019

abstract: Abstract In this work we present results concerning the cluster beam synthesis of metal and metal oxide nanoparticles together with their applications in emerging memories like nanoparticle Flash memories and resistive switching memories. Regarding the former, very large memory windows of 7 8 V are presented at voltages below 10 V using Ni, Pt or Au nanoparticles. Regarding the latter, metal insulator metal devices based upon titanium oxide nanoparticle films show switching voltages well below 1 V with high to low resistance ratios as high as 1000. An in depth analysis of the physical and electrical properties of the titanium oxide nanoparticle films allows to shine light onto the physics behind the switching mechanism.
author_names: Emanuele Verrelli

Dimitris Tsoukalas
title: Cluster beam synthesis of metal and metal oxide nanoparticles for emerging memories
year: 2014

abstract: The present invention is a sol gel (sol gel) and photo reaction to form and combine the metal oxide nanoparticles in a photocurable transparent polymer by the organic thin film transistor of the change in the electric permittivity using the easy composition in the gate insulator and its relates to the manufacturing method, the invention includes a substrate, a photocurable transparent inorganic polymer composite layer, the organic active layer, and source and drain electrode layers including metal oxide nanoparticles to be formed on the electrode layer, and electrodes formed on the substrate, through the gel and photocuring reaction photocurable transparent inorganic polymer composite layer is spin casting a mixture of the metal oxide precursor and a photo curing transparent polymer (spin casting) after forming an organic film by the sol containing the metal oxide nano particles a portion thereof is converted to a nano inorganic particles provides an organic thin film transistor characterized in that have a dielectric. The organic thin film transistor according to the present invention, the dielectric constant of the gate insulator, and significantly high control is easy compared with the gate insulator that is conventionally used, as well as transparent to retain the characteristics of the photo transparent polymer, the photo furnace can be fine pattern formation It has the advantage of fairness is very good. The sol gel reaction, photocuring, nanotechnology, nano composite material, organic transparent gate insulator, organic thin film transistor
title: Organic thin film transistors comprising metal oxide nanoparticles within transparent polymer gate insulator layer and method for fabricating the same by using sol gel and photocure reactions
year: 2008

abstract: The laser sintering employing a CW DPSS laser was applied to the fabrication of transparent conductive films using silver and indium tin oxide (ITO) nanoparticle inks. The laser sintering of an Ag nanoparticle thin film gave a transparent conductive film with a thickness of ca. 10 nm, whereas such a thin film fabricated by conventional heat treatment using an electronic furnace was insulator because of the formation of isolated silver grains during the slow heating process The influences of the laser sintering conditions such as laser scan speed on the conductivity and the transparency were studied. The laser sintering using ITO nanoparticle ink gave a high transparent conductive film by one step scanning of laser beam in air.
author_names: Akira Watanabe

Gang Qin
title: Transparent conductive films based on the laser sintering of metal and metal oxide nanoparticles
venue: Photonics West Lasers and Applications in Science and Engineering
year: 2014

abstract: Abstract. Microscale optical devices enabled by wireless power harvesting and telemetry facilitate manipulation and testing of localized biological environments (e.g. neural recording and stimulation, targeted delivery to cancer cells) Design of integrated microsystems utilizing optical power harvesting and telemetry will enable complex in vivo applications like actuating a single nerve, without the difficult requirement of extreme optical focusing or use of nanoparticles. Silicon on insulator (SOI) based platforms provide a very powerful architecture for such miniaturized platforms as these can be used to fabricate both optoelectronic and microelectronic devices on the same substrate. Near infrared biomedical optics can be effectively utilized for optical power harvesting to generate optimal results compared with other methods (e.g. RF and acoustic) at submillimeter size scales intended for such designs. We present design and integration techniques of optical power harvesting structures with complementary metal oxide semiconductor platforms using SOI technologies along with monolithically integrated electronics. Such platforms can become the basis of optoelectronic biomedical systems including implants and lab on chip systems.
author_names: Muhammad Mujeeb-U -Rahman

Axel Scherer
title: Silicon on insulator based complementary metal oxide semiconductor integrated optoelectronic platform for biomedical applications
venue: Journal of biomedical optics
year: 2016

abstract: A chemical reaction between polyamic acid, a precursor of polyimide known as a stable insulating polymer, and a metal thin film makes metal oxide nanoparticles located in polyimide matrix. In a metal oxide semiconductor (MOS) diode with such nanoparticles and polyimide, the current voltage (I V) characteristics behave abnormally, not showing the general MOS property. The characteristics possibly apply to resistance random access memory (RRAM) In this study, we investigated the conductance and the I V characteristics with temperature modulation that divide the effects of the activation energy. The I V hysteresis from a measured voltage sweep is an interesting physical phenomenon and is useful in many applications.
author_names: Jae Hoon Kim

Dong Uk Lee

Eun Kyu Kim
title: Current voltage characteristics of a metal insulator semiconductor structure containing metal oxide nanoparticles within a polyimide matrix
year: 2007

abstract: The present invention relates to an organic thin film transistor comprising a photocurable transparent inorganic/polymer composite layer as a gate insulator layer in which metal oxide nanoparticles are generated within a photocurable transparent polymer through sol gel and photocuring reactions and whose permittivity is easily regulated; and a fabrication method thereof. Since the organic thin film transistor accord ing to the present invention utilizes the photocurable trans parent inorganic/polymer composite layer showing a signifi cantly high and readily controllable permittivity as a gate insulator, it is capable of operating under low Voltage condi tions and has a high on/off current ratio due to low leakage current. Further, the organic thin film transistor according to the present invention preserves the unique properties of the photocurable transparent polymer, enabling the formation of a photocurable micropattern of a gate insulator having high processibility.
author_names: Matthew SSmith

soook 1 2m
title: ORGANIC THIN FILMI TRANSISTORS INCLUDING METAL OXDE NANOPARTICLES WITHINA PHOTOCURABLE TRANSPARENT POLYMER GATE INSULATOR LAYER AND METHOD FOR FABRICATING THE SAME BY USING SOL GEL
year: 2017

abstract: Due to excellent metal insulator transition property, vanadium dioxide nanoparticles (VO2 NPs) based nanomaterials are extensively studied and applied in various fields, and thus draw safety concerns of VO2 NPs exposure through various routes. Herein, the cytotoxicity of VO2 NPs (N VO2) and titanium dioxide coated VO2 NPs (T VO2) to typical human lung cell lines (A549 and BEAS 2B) was studied by using a series of biological assays. It was found that both VO2 NPs induced a dose dependent cytotoxicity, and the two cell lines displayed similar sensitivity to VO2 NPs. Under the same conditions, T VO2 NPs showed slightly lower cytotoxicity than N VO2 in both cells, indicating the surface coating of titanium dioxide mitigated the toxicity of VO2 NPs. Titanium dioxide coating changed the surface property of VO2 NPs and reduced the vanadium release of particles, and thus helped lowing the toxicity of VO2 NPs. The induced cell viability loss was attributed to apoptosis and proliferation inhibition, which were supported by the assays of apoptosis, mitochondrial membrane damage, caspase 3 level, and cell cycle arrest. The oxidative stress, i.e. enhanced reactive oxygen species generation and suppressed reduced glutathione in A549 and BEAS 2B cells was one of the major mechanisms of the cytotoxicity of VO2 NPs. These findings provide safety guidance for the practical applications of vanadium dioxide based materials.
author_names: Wensong Xi

Huan Tang

Yuanyuan Liu

Chun-Yuan Liu

Yanfeng Gao

Aoneng Cao

Yuanfang Liu

Zhang Chen

Haifang Wang
title: Cytotoxicity of vanadium oxide nanoparticles and titanium dioxide coated vanadium oxide nanoparticles to human lung cells
venue: Journal of applied toxicology JAT
year: 2019

abstract: The coupling of the localized surface plasmon resonance of Au nanoparticles is utilized to deliver a visible light stimulus to control conduction at the LaAlO3 /SrTiO3 interface. A giant photoresponse and the controllable metal insulator transition are characterized at this heterointerface. This study paves a new route to optical control of the functionality at the heterointerfaces.
author_names: Jheng-Cyuan Lin

Vu Thanh Tra

Dung-Sheng Tsai

Tai-Te Lin

Po-Cheng Huang

Wei-Lun Hsu

Hui Jun Wu

Rong Huang

Nguyen Van Chien

Ryuji Yoshida

Jiunn-Yuan Lin

Yuichi Ikuhara

Y P Chiu

Shangjr Gwo

Din Ping Tsai

Jr-hau He

Y H Chu
title: Control of the Metal Insulator Transition at Complex Oxide Heterointerfaces through Visible Light.
venue: Advanced materials
year: 2016

abstract: Metal insulator transition (MIT) in strongly correlated electronic materials has enormous potential with scientific and technological impacts in future oxide nanoelectronic devices. Although photo induced MIT can provide opportunities to extend the novel functionality of strongly correlated electronic materials, there have rarely been reports on it. Here, we report MIT provoked by visible near infrared light in Ag decorated VO2 nanorod arrays (NRs) because of localized surface plasmon resonance (LSPR) and its application to broadband photodetectors. Our simulation results based on the finite difference time domain method show that the electric field resulting from LSPR can be generated at the interface between Ag nanoparticles and VO2 layers under vis NIR illumination. Using high resolution transmission electronic microscopy and Raman spectroscopy, we observe the MIT and structural phase transition in the Ag decorated VO2 NRs due to the LSPR effect. The optoelectronic measurements confirm that high, fast, and broad photoresponse of Ag decorated VO2 NRs is attributed to photo induced MIT due to LSPR. Our study will open up a new strategy to trigger MIT in strongly correlated electronic materials through functionalization with plasmonic nanoparticles and serve as a valuable proof of concept for next generation optoelectronic devices with fast response, low power consumption, and high performance.
author_names: Kootak Hong

Cheon Woo Moon

Jun Min Suh

Tae Hyung Lee

Seong-il Kim

Sanghan Lee

Ho Won Jang
title: Daylight Induced Metal Insulator Transition in Ag Decorated Vanadium Dioxide Nanorod Arrays.
venue: ACS applied materials interfaces
year: 2019