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Search for "gas sensors" in Full Text gives 104 result(s) in Beilstein Journal of Nanotechnology.

Nanostructures for sensors, electronics, energy and environment III

  • Nunzio Motta

Beilstein J. Nanotechnol. 2017, 8, 1530–1531, doi:10.3762/bjnano.8.154

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  • Nunzio Motta School of Chemistry, Physics and Mechanical Engineering and Institute for Future Environments, Queensland University of Technology, 2 George St., Brisbane 4001, Australia 10.3762/bjnano.8.154 Keywords: biosensors; electronics; energy; environment; gas sensors; solar cells; This
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Published 27 Jul 2017

Hierarchically structured nanoporous carbon tubes for high pressure carbon dioxide adsorption

  • Julia Patzsch,
  • Deepu J. Babu and
  • Jörg J. Schneider

Beilstein J. Nanotechnol. 2017, 8, 1135–1144, doi:10.3762/bjnano.8.115

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  • successfully tested as potential material for catalysis [1], gas sensors [2], electronic devices [3] and for gas adsorption [4]. Activated carbons (ACs) are widely used for gas adsorption because of their straightforward production, low cost and thermal stability [5][6][7]. Nevertheless, the excellent
  • created by nanocasting [29]. All of these approaches have allowed for the synthesis of ordered hierarchical macro–mesoporous materials [24]. Electrospinning is a versatile technique for the synthesis of different one-dimensional forms such as fibers, tubes or wires for various applications such as gas
  • sensors [30][31][32] or photoelectrodes for dye-sensitive solar cells [33]. This technique has also be extended for the synthesis of one-dimensional metal oxide nanomaterials [34][35][36][37]. Herein, we introduce a process which allows highly porous carbon tubes as well as nanocrystalline silicon carbide
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Published 24 May 2017

Study of the correlation between sensing performance and surface morphology of inkjet-printed aqueous graphene-based chemiresistors for NO2 detection

  • F. Villani,
  • C. Schiattarella,
  • T. Polichetti,
  • R. Di Capua,
  • F. Loffredo,
  • B. Alfano,
  • M. L. Miglietta,
  • E. Massera,
  • L. Verdoliva and
  • G. Di Francia

Beilstein J. Nanotechnol. 2017, 8, 1023–1031, doi:10.3762/bjnano.8.103

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  • deposition of small ink volumes and the versatility of the exploitable inks and substrates. Herein we present a feasibility study of chemiresistive gas sensors inkjet-printed onto paper substrates, in which a LPE graphene suspension dispersed in a water/isopropanol (H2O/IPA) mixture is used as sensing ink
  • , low-cost process that meets the requests coming from the increasing field of paper-based electronics and paving the way towards a flexible, green-by-design mass production. Keywords: aqueous graphene dispersion; gas sensors; inkjet printing; liquid phase exfoliation; nitrogen dioxide; paper-based
  • suspension synthesized by using eco-friendly solvents deposited onto recyclable substrates by IJP well meets the technological requirements for the production of low-environmental impact, low-cost sensing devices. The aim of the current research is a feasibility study of chemiresistive gas sensors by inkjet
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Published 09 May 2017

CVD transfer-free graphene for sensing applications

  • Chiara Schiattarella,
  • Sten Vollebregt,
  • Tiziana Polichetti,
  • Brigida Alfano,
  • Ettore Massera,
  • Maria Lucia Miglietta,
  • Girolamo Di Francia and
  • Pasqualina Maria Sarro

Beilstein J. Nanotechnol. 2017, 8, 1015–1022, doi:10.3762/bjnano.8.102

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  • Microelectronics, Delft, The Netherlands ENEA C.R. Piazzale Enrico Fermi, 1, 80055 Portici (Naples), Italy 10.3762/bjnano.8.102 Abstract The sp2 carbon-based allotropes have been extensively exploited for the realization of gas sensors in the recent years because of their high conductivity and large specific
  • material” of the 21st century with plentiful applications in several fields such as energy storage, biomedical, electronics [1]. Among these applications, one of the most promising is likely that in the field of gas sensors, where the main requirements, namely high specific surface-to-volume ratio, high
  • analytes. In addition, the possibility of miniaturizing such an array goes in the direction of creating a portable electronic nose. Conclusion We have shown the potential of a transfer-free deposition technique for the fabrication of graphene-based gas sensors by a process that is fully compatible with
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Published 08 May 2017

BTEX detection with composites of ethylenevinyl acetate and nanostructured carbon

  • Santa Stepina,
  • Astrida Berzina,
  • Gita Sakale and
  • Maris Knite

Beilstein J. Nanotechnol. 2017, 8, 982–988, doi:10.3762/bjnano.8.100

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  • polymer-based nanostructured composite filled with electroconductive nanoparticles. Compared to gas sensors based on metal oxides this type of sensor ensures a much easier usage because polymer-based composites do not require high operating temperatures and work at room temperature. The gas-sensing
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Published 04 May 2017

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

  • Arpita Jana,
  • Elke Scheer and
  • Sebastian Polarz

Beilstein J. Nanotechnol. 2017, 8, 688–714, doi:10.3762/bjnano.8.74

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  • thermochromic transition at 257 °C and this material is used as a catalyst for industrial processes, gas sensors and in LIBs [105]. Various nanostructures of V2O5 such as nanotubes, nanowires, nanofibers, nanobelts, and nanorods have been prepared by sol–gel processes, hydrothermal processes [106
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Published 24 Mar 2017

Gas sensing properties of MWCNT layers electrochemically decorated with Au and Pd nanoparticles

  • Elena Dilonardo,
  • Michele Penza,
  • Marco Alvisi,
  • Riccardo Rossi,
  • Gennaro Cassano,
  • Cinzia Di Franco,
  • Francesco Palmisano,
  • Luisa Torsi and
  • Nicola Cioffi

Beilstein J. Nanotechnol. 2017, 8, 592–603, doi:10.3762/bjnano.8.64

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  • greatly to the improvement and diffusion of gas sensor technology [5]. Specifically, the discovery of carbon nanotubes (CNTs) has extensively advanced gas sensor applications [6]. Indeed, CNTs are a class of promising materials in the field of gas sensors, thanks to their unique properties, such as a
  • large surface area and hollow structure, that make them potentially applicable as a sensing layer in gas sensors [7][8]. Semiconducting MWCNTs are frequently used in chemiresistors, since they are extremely sensitive to charge transfer and chemical doping effects in the presence of oxidizing or reducing
  • analytes, reveling mostly a p-type behavior [9][10]. Recently, researches have revealed not only the positive properties of CNT-based gas sensors, but also their weaknesses: weak sensing response with low selectivity and long recovery. These disadvantages are caused by strong interactions between the
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Published 10 Mar 2017

Graphene functionalised by laser-ablated V2O5 for a highly sensitive NH3 sensor

  • Margus Kodu,
  • Artjom Berholts,
  • Tauno Kahro,
  • Mati Kook,
  • Peeter Ritslaid,
  • Helina Seemen,
  • Tea Avarmaa,
  • Harry Alles and
  • Raivo Jaaniso

Beilstein J. Nanotechnol. 2017, 8, 571–578, doi:10.3762/bjnano.8.61

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  • characteristics. In particular, increasing the selectivity of graphene-based gas sensors is crucial for their future implementation. Recently, the improvement of gas sensing characteristics has been demonstrated with resistive type gas sensors based on single-layer graphene modified by a deposited layer of
  • -functionalised graphene sensor to polluting gases NO2 and NH3. All the gas measurements in this work were recorded under continuous excitation with ultraviolet (UV) light (λ = 365 nm) at room temperature (RT). Illumination by UV light can enhance the sensing performance of graphene-based gas sensors. An
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Published 07 Mar 2017

Thin SnOx films for surface plasmon resonance enhanced ellipsometric gas sensing (SPREE)

  • Daniel Fischer,
  • Andreas Hertwig,
  • Uwe Beck,
  • Volkmar Lohse,
  • Detlef Negendank,
  • Martin Kormunda and
  • Norbert Esser

Beilstein J. Nanotechnol. 2017, 8, 522–529, doi:10.3762/bjnano.8.56

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  • J.E.Purkinje University, Faculty of Science, Department of Physics, Ceske mladeze 8, 400 96 Usti nad Labem, Czech Republic Leibniz Institut für Analytische Wissenschaften ISAS e.V., Schwarzschildstr. 12, 12489 Berlin, Germany 10.3762/bjnano.8.56 Abstract Background: Gas sensors are very important in several
  • sensing devices with different coated SPREE sensors. Keywords: doped tin oxide; ellipsometry; gas sensing; surface plasmon resonance; thin films; transparent conductive oxides; Introduction Gas sensors are an important tool for example in the fields of process monitoring, workplace safety or
  • years, the use of tin oxide (SnOx) layers for gas sensors has attracted some interest [8][9][10]. These layers are widely used due to their excellent performance in the detection of gases. Due to the high dependency of the sensitivity of these layers in the gas detection on the preparation procedure
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Published 28 Feb 2017
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  • -oxide electronics; X-ray photoelectron spectroscopy (XPS); Introduction For many years, tin dioxide (SnO2) has been widely used as the active material for resistive-type gas sensors for oxidizing and reducing gases [1], thin transparent electrodes and barrier layers in solar cells [2]. This is related
  • to its high and variable electrical conductivity in the range of 100 Ω−1·cm−1 to 102 Ω−1·cm−1 due to the existence of free electrons in oxygen vacancies. This effect has been widely applied for the construction of prototypical gas sensors devices with both thick and thin films [3][4][5][6][7][8]. The
  • advantages such as simplicity, repeatability, and low power consumption [5][6][7][8]. Despite many years of research, there are still a number of unsolved limitations to SnO2 resistive-type thin-film gas sensors, such as small sensitivity caused by low internal surface or very long response and recovery
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Published 27 Feb 2017

Advances in the fabrication of graphene transistors on flexible substrates

  • Gabriele Fisichella,
  • Stella Lo Verso,
  • Silvestra Di Marco,
  • Vincenzo Vinciguerra,
  • Emanuela Schilirò,
  • Salvatore Di Franco,
  • Raffaella Lo Nigro,
  • Fabrizio Roccaforte,
  • Amaia Zurutuza,
  • Alba Centeno,
  • Sebastiano Ravesi and
  • Filippo Giannazzo

Beilstein J. Nanotechnol. 2017, 8, 467–474, doi:10.3762/bjnano.8.50

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  • graphene is very sensitive to the adsorption of charged/polar species at or near its surface – a peculiarity particularly suitable for chemical/biological sensing. As an example, gas sensors with single molecule sensitivity have been initially demonstrated using high quality, exfoliated graphene from
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Published 20 Feb 2017

Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation

  • Amit Singhania and
  • Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 264–271, doi:10.3762/bjnano.8.29

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  • refractory metal [6], in thermal barrier coating [7], gas sensors [8], in solid oxide fuel cells [9], in ceramic production, insulation and abrasives. Carbon monoxide (CO) is considered a major pollutant and it causes serious health problems. It is important to control CO released from natural sources and
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Published 26 Jan 2017

Colorimetric gas detection by the varying thickness of a thin film of ultrasmall PTSA-coated TiO2 nanoparticles on a Si substrate

  • Urmas Joost,
  • Andris Šutka,
  • Meeri Visnapuu,
  • Aile Tamm,
  • Meeri Lembinen,
  • Mikk Antsov,
  • Kathriin Utt,
  • Krisjanis Smits,
  • Ergo Nõmmiste and
  • Vambola Kisand

Beilstein J. Nanotechnol. 2017, 8, 229–236, doi:10.3762/bjnano.8.25

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  • features of the nanoparticles were studied by a transmission electron microscope (TEM, Tecnai G20, FEI) operated at 200 kV. Results and Discussion Optical gas sensors based on porous Bragg stacks utilize the phenomenon of analyte vapor being absorbed in the pores of the stack, which changes the effective
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Published 24 Jan 2017

Nanocrystalline TiO2/SnO2 heterostructures for gas sensing

  • Barbara Lyson-Sypien,
  • Anna Kusior,
  • Mieczylaw Rekas,
  • Jan Zukrowski,
  • Marta Gajewska,
  • Katarzyna Michalow-Mauke,
  • Thomas Graule,
  • Marta Radecka and
  • Katarzyna Zakrzewska

Beilstein J. Nanotechnol. 2017, 8, 108–122, doi:10.3762/bjnano.8.12

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  • to the adsorption of oxygen ions at the surface of nanomaterials. Keywords: gas sensors; hydrogen; n–n heterojunctions; nanomaterials; TiO2/SnO2; Introduction The TiO2–SnO2 system is extremely important for gas sensing as already proved by many works already published [1][2][3][4][5][6][7][8][9][10
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Published 12 Jan 2017

Sensitive detection of hydrocarbon gases using electrochemically Pd-modified ZnO chemiresistors

  • Elena Dilonardo,
  • Michele Penza,
  • Marco Alvisi,
  • Gennaro Cassano,
  • Cinzia Di Franco,
  • Francesco Palmisano,
  • Luisa Torsi and
  • Nicola Cioffi

Beilstein J. Nanotechnol. 2017, 8, 82–90, doi:10.3762/bjnano.8.9

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  • nanorods (ZnO NRs) were proposed as active sensing layers in chemiresistive gas sensors for hydrocarbon (HC) gas detection (e.g., CH4, C3H8, C4H10). The presence of Pd nanoparticles (NPs) on the surface of ZnO NRs, obtained after the thermal treatment at 550 °C, was revealed by morphological and surface
  • ][13][14]. Since a precise monitoring of HCs even at low concentrations can be beneficial to preserve the environment and human health, the improvement of cost-effective HCs gas sensors, including networked sensor-systems and new strategies for hydrocarbon sensing, is a matter of interest for the
  • scientific community. HCs gas sensors based on organic conducting polymers (such as polyaniline (PANI) [15][16], polypyrrole (PPy) [17] and polythiophene (PTh) [18]) and on carbon-based nanomaterials with desired functionality and conductivity (e.g., carbon nanotubes (CNTs) [19] and graphene [20]) exhibit a
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Published 10 Jan 2017

Nanostructured SnO2–ZnO composite gas sensors for selective detection of carbon monoxide

  • Paul Chesler,
  • Cristian Hornoiu,
  • Susana Mihaiu,
  • Cristina Vladut,
  • Jose Maria Calderon Moreno,
  • Mihai Anastasescu,
  • Carmen Moldovan,
  • Bogdan Firtat,
  • Costin Brasoveanu,
  • George Muscalu,
  • Ion Stan and
  • Mariuca Gartner

Beilstein J. Nanotechnol. 2016, 7, 2045–2056, doi:10.3762/bjnano.7.195

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  • concept of integration has been the main drive that supported research and development in the domain of smart devices for remote sensing, that is, sensors based on changes in electrical conductivity [1]. The main advantages presented by this category of gas sensors are low cost compared to other sensing
  • composite gas sensors to CO is shown in Figure 10. From Figure 10 it is obvious that sensor response to CO is highly influenced by its composition. Pristine ZnO has the lowest response to CO, as expected [36]. With increasing SnO2 quantity from 0 to 2 wt % in the S2 sample, a high increase in response is
  • sensors must be selective towards a specific gas in a given gaseous environment. This is still a challenging issue for the commercially available gas sensors. As it was discussed in the introduction section of this article, selectivity towards a specific gas may be tuned by using composite materials. For
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Published 22 Dec 2016

Nanostructured TiO2-based gas sensors with enhanced sensitivity to reducing gases

  • Wojciech Maziarz,
  • Anna Kusior and
  • Anita Trenczek-Zajac

Beilstein J. Nanotechnol. 2016, 7, 1718–1726, doi:10.3762/bjnano.7.164

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  • material for application as an acetone sensor. Keywords: acetone; flower-like 3D nanostructures; gas sensors; selectivity; titanium dioxide; Introduction The market for resistive-type gas sensors is dominated by materials developed on the base of thin or thick layers composed of polycrystalline metal
  • , nanotubes composed of a SnO2–TiO2 solid solution, or TiO2 accompanied by phases from the Sn–O, significantly improves their properties [27]. A similar effect is observed when the same nanostructures are applied as gas sensors. SnO2 seems to catalyze the reaction to gases due to the presence of nanoparticles
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Published 15 Nov 2016

Enhanced detection of nitrogen dioxide via combined heating and pulsed UV operation of indium oxide nano-octahedra

  • Oriol Gonzalez,
  • Sergio Roso,
  • Xavier Vilanova and
  • Eduard Llobet

Beilstein J. Nanotechnol. 2016, 7, 1507–1518, doi:10.3762/bjnano.7.144

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  • the use of combined heating and pulsed UV light activation of indium oxide gas sensors for enhancing their performance in the detection of nitrogen dioxide in air. Indium oxide nano-octahedra were synthesized at high temperature (900 °C) via vapour-phase transport and screen-printed onto alumina
  • limiting the implementation of widely distributed, smart wireless sensor systems that can be deployed and then remain in operation with no further human intervention. Overcoming these barriers entails developing gas sensors featuring low cost, small size, enhanced sensitivity, selectivity, stability and
  • one or more gas sensors in a tag, would turn the tag into a wireless sensor that could be easily read with an inexpensive reader via a radiofrequency link [2][3]. Nowadays, distributed wireless boxes to monitor air pollution already exist. These employ electrochemical gas sensors that are ultra-low
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Published 25 Oct 2016

A composite structure based on reduced graphene oxide and metal oxide nanomaterials for chemical sensors

  • Vardan Galstyan,
  • Elisabetta Comini,
  • Iskandar Kholmanov,
  • Andrea Ponzoni,
  • Veronica Sberveglieri,
  • Nicola Poli,
  • Guido Faglia and
  • Giorgio Sberveglieri

Beilstein J. Nanotechnol. 2016, 7, 1421–1427, doi:10.3762/bjnano.7.133

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  • the synthesis of ZnO films, nanowires and ZnO-based hybrids for applications in opto-electronics as well as in gas sensors [7][12][13][14][15]. ZnO has several advantages regarding the application in sensor structures. However, there are many obstacles (high resistivity and operating temperature
  • , sensitivity and selectivity) with respect to the application of ZnO nanomaterials in chemical gas sensors that need to be overcome [7][14]. Hybrid structures composed of two or more different materials with diverse functional properties are of great interest to develop advanced composite materials for
  • material varying the concentration and the reducing regimes of RGO in the structure to find the best regimes for the practical applications. Conclusion In conclusion, chemiresistive gas sensors based on ZnO and RGO nanostructures with high sensing performance for the detection of VOCs have been developed
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Published 10 Oct 2016

Ammonia gas sensors based on In2O3/PANI hetero-nanofibers operating at room temperature

  • Qingxin Nie,
  • Zengyuan Pang,
  • Hangyi Lu,
  • Yibing Cai and
  • Qufu Wei

Beilstein J. Nanotechnol. 2016, 7, 1312–1321, doi:10.3762/bjnano.7.122

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  • [21][23][24][25][26][27]. In this paper, In2O3/PANI composite nanofibers were prepared by the combination of electrospinning technique, calcination method and in situ polymerization. This study presents the improved response capabilities of gas sensors based on In2O3/PANI composite nanofibers, which
  • washed with deionized water and centrifuged for 5 min. At last, the composite nanofibers were filtered and dried in vacuum at 50 °C for 48 h. The schematic of the preparation of In2O3/PANI composite nanofibers is illustrated in Figure 1. Fabrication of In2O3/PANI gas sensors The ground In2O3/PANI
  • clear that the responses of In2O3/PANI gas sensors were much higher than pure PANI. The response of In2O3/PANI-2 exhibited the highest value. The response of In2O3/PANI-2 to 1000 ppm was about twice as large as that of In2O3/PANI-1. When the weight ratio of In2O3 to aniline was raised to 1:4 (In2O3/PANI
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Published 19 Sep 2016

Photocurrent generation in carbon nanotube/cubic-phase HfO2 nanoparticle hybrid nanocomposites

  • Protima Rauwel,
  • Augustinas Galeckas,
  • Martin Salumaa,
  • Frédérique Ducroquet and
  • Erwan Rauwel

Beilstein J. Nanotechnol. 2016, 7, 1075–1085, doi:10.3762/bjnano.7.101

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  • combination of nanoparticles with carbon nanotubes (CNTs) has proven to greatly broaden the area of potential applications, such as gas sensors [1][2], solar cells [3][4], bioimaging [5] and IR detectors [6], most of which require efficient charge transfer from the nanoparticle to the CNT and charge
  • conduction via the CNT. To date, numerous studies have been reported on the decoration of CNTs with metal oxides including TiO2 [7][8] and ZnO [9] for solar cell applications and SnO2 for gas sensors. Reports on the fabrication of an all carbon nanocomposite combining CNTs, graphene and carbon quantum dots
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Published 26 Jul 2016

NO gas sensing at room temperature using single titanium oxide nanodot sensors created by atomic force microscopy nanolithography

  • Li-Yang Hong and
  • Heh-Nan Lin

Beilstein J. Nanotechnol. 2016, 7, 1044–1051, doi:10.3762/bjnano.7.97

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  • potential application of single metal oxide NDs for gas sensing with a performance that is comparable with that of metal oxide nanowire gas sensors. Keywords: atomic force microscopy nanolithography; photo-activation; photo-recovery; resistive NO gas sensor; titanium oxide nanodot sensor; Introduction In
  • recent years, gas sensors have been widely used in a variety of fields, such as medical diagnosis [1][2], environmental monitoring [3] and combustion emission control [4]. Among all types of gas sensors, resistor-type gas sensors based on semiconducting metal oxide nanomaterials [5][6][7][8] are more
  • applications [5][11]. Semiconducting metal oxide gas sensors generally need to work at high temperatures due to the high energy required for surface reactions [5][12][13]. However, a high operating temperature results in issues with durability and reliability of the device [5]. To overcome this drawback, light
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Published 20 Jul 2016

Microwave solvothermal synthesis and characterization of manganese-doped ZnO nanoparticles

  • Jacek Wojnarowicz,
  • Roman Mukhovskyi,
  • Elzbieta Pietrzykowska,
  • Sylwia Kusnieruk,
  • Jan Mizeracki and
  • Witold Lojkowski

Beilstein J. Nanotechnol. 2016, 7, 721–732, doi:10.3762/bjnano.7.64

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  • oxides semiconductors. Zinc oxide (ZnO) is a II–VI semiconductor characterised by a wide band gap of 3.3 eV and a high exciton binding energy of circa 60 meV [4]. ZnO is used in optoelectronic devices, solar cells, data carriers, light emitting diodes (LEDs), gas sensors, thermoelectric devices
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Published 19 May 2016

Bacteriorhodopsin–ZnO hybrid as a potential sensing element for low-temperature detection of ethanol vapour

  • Saurav Kumar,
  • Sudeshna Bagchi,
  • Senthil Prasad,
  • Anupma Sharma,
  • Ritesh Kumar,
  • Rishemjit Kaur,
  • Jagvir Singh and
  • Amol P. Bhondekar

Beilstein J. Nanotechnol. 2016, 7, 501–510, doi:10.3762/bjnano.7.44

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  • , nanomaterial–biomolecule hybrid gas sensors. Keywords: amphipol; bacteriorhodopsin; bio-hybrid; gas sensing; ITO; ZnO nanostructure; Introduction Nanomaterial–biomolecule conjugates have emerged into one of the most rapidly developing and sought after areas in modern biomolecular device fabrication and
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Published 04 Apr 2016

Evaluation of gas-sensing properties of ZnO nanostructures electrochemically doped with Au nanophases

  • Elena Dilonardo,
  • Michele Penza,
  • Marco Alvisi,
  • Cinzia Di Franco,
  • Francesco Palmisano,
  • Luisa Torsi and
  • Nicola Cioffi

Beilstein J. Nanotechnol. 2016, 7, 22–31, doi:10.3762/bjnano.7.3

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  • , respectively. The pristine ZnO and Au@ZnO nanocomposites are proposed as active layer in chemiresistive gas sensors for low-cost processing. Gas-sensing measurements towards NO2 were collected at 300 °C, evaluating not only the Au-doping effect, but also the influence of the different ZnO nanostructures on the
  • gas-sensing properties. Keywords: Au-doped ZnO; chemiresistive gas sensor; electrosynthesis; NO2 gas sensor; ZnO nanostructures; Introduction Today the use of low-cost portable gas sensors is essential to detect and to monitor toxic, polluting and combustible gases for the environmental protection
  • . In this context, chemical gas sensors have a deep impact on human security, medical prevention and diagnosis, monitoring and detection of polluting and toxic substances [1]. Specifically, nowadays metal oxide semiconductors (MOS), such as WO3, SnO2, In2O3 and TiO2 [2], have been largely used as
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Published 08 Jan 2016
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