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

Plasma fluorination of vertically aligned carbon nanotubes: functionalization and thermal stability

  • Claudia Struzzi,
  • Mattia Scardamaglia,
  • Axel Hemberg,
  • Luca Petaccia,
  • Jean-François Colomer,
  • Rony Snyders and
  • Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 2263–2271, doi:10.3762/bjnano.6.232

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  • precursor for several reactions (the introduction of polar groups has been successfully adopted to initiate subsequent functionalization [7][8][9][10]) and a solution for profitably implementing the carbon-based nanomaterials in several applications, such as gas sensors, batteries and polymeric switches [11
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Published 01 Dec 2015

Paramagnetism of cobalt-doped ZnO nanoparticles obtained by microwave solvothermal synthesis

  • Jacek Wojnarowicz,
  • Sylwia Kusnieruk,
  • Tadeusz Chudoba,
  • Stanislaw Gierlotka,
  • Witold Lojkowski,
  • Wojciech Knoff,
  • Malgorzata I. Lukasiewicz,
  • Bartlomiej S. Witkowski,
  • Anna Wolska,
  • Marcin T. Klepka,
  • Tomasz Story and
  • Marek Godlewski

Beilstein J. Nanotechnol. 2015, 6, 1957–1969, doi:10.3762/bjnano.6.200

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  • ][13][14], solar cells [10], catalysts [15], energy storage (battery) materials [16], fast data storage [17], light-emitting diodes (LEDs) [18], gas sensors [10], thermoelectric devices [19], varistors [20][21], window materials for displays [21], laser technology [10], surface acoustic wave devices
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Published 30 Sep 2015

Formation of pure Cu nanocrystals upon post-growth annealing of Cu–C material obtained from focused electron beam induced deposition: comparison of different methods

  • Aleksandra Szkudlarek,
  • Alfredo Rodrigues Vaz,
  • Yucheng Zhang,
  • Andrzej Rudkowski,
  • Czesław Kapusta,
  • Rolf Erni,
  • Stanislav Moshkalev and
  • Ivo Utke

Beilstein J. Nanotechnol. 2015, 6, 1508–1517, doi:10.3762/bjnano.6.156

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  • controlling the beam scanning three dimensional structures of a complex shape can be created in a single direct-write deposition step onto planar or non-planar surfaces [2]. Nanodevices with various functionalities have been deposited comprising gas sensors [3][4], magnetic sensors [5][6] strain sensors [7
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Published 13 Jul 2015

Characterization of nanostructured ZnO thin films deposited through vacuum evaporation

  • Jose Alberto Alvarado,
  • Arturo Maldonado,
  • Héctor Juarez,
  • Mauricio Pacio and
  • Rene Perez

Beilstein J. Nanotechnol. 2015, 6, 971–975, doi:10.3762/bjnano.6.100

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  • , they can be used in many applications, such as gas sensors [4]. A wide range of techniques to deposit thin films are used, such as molecular beam epitaxy (MBE) [5], single-source chemical vapor deposition (SS CVD) [6], metalorganic chemical vapor deposition (MOCVD) [7], sol–gel [8], spray pyrolysis [9
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Published 16 Apr 2015

Effects of swift heavy ion irradiation on structural, optical and photocatalytic properties of ZnO–CuO nanocomposites prepared by carbothermal evaporation method

  • Sini Kuriakose,
  • D. K. Avasthi and
  • Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2015, 6, 928–937, doi:10.3762/bjnano.6.96

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  • gap and large exciton binding energy, making it suitable for a wide range of applications such as UV lasers [11], dye-sensitized solar cells [12][13][14], gas sensors [15][16], UV sensors [17], light emitting diodes [18], spintronic devices [19], transparent conductive electrodes [20], lasers [21
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Published 10 Apr 2015

Pt- and Pd-decorated MWCNTs for vapour and gas detection at room temperature

  • Hamdi Baccar,
  • Atef Thamri,
  • Pierrick Clément,
  • Eduard Llobet and
  • Adnane Abdelghani

Beilstein J. Nanotechnol. 2015, 6, 919–927, doi:10.3762/bjnano.6.95

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  • application of this concept by producing platinum-decorated carbon nanotubes by means of a wet-chemistry technique [27]. Star et al. electroplated carbon nanotubes with gold, rhodium, palladium or platinum to obtain metal-decorated nanotubes as gas sensors for carbon monoxide, nitrogen dioxide, methane
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Published 09 Apr 2015

Overview of nanoscale NEXAFS performed with soft X-ray microscopes

  • Peter Guttmann and
  • Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 595–604, doi:10.3762/bjnano.6.61

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  • nanoscale structures are becoming more and more important. Not only for the further miniaturization of semiconductor devices like carbon nanotube based transistors, but also for newly developed efficient energy storage devices, gas sensors or catalytic systems nanoscale and functionalized materials have to
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Published 27 Feb 2015

Fundamental edge broadening effects during focused electron beam induced nanosynthesis

  • Roland Schmied,
  • Jason D. Fowlkes,
  • Robert Winkler,
  • Phillip D. Rack and
  • Harald Plank

Beilstein J. Nanotechnol. 2015, 6, 462–471, doi:10.3762/bjnano.6.47

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  • ][40], and nanoscale stress/strain or gas sensors [28][41][42]. While highly accurate and reproducible surface morphologies are essential for some of these applications, e.g., nano-optics, all of these applications require predictable and reproducible shape control in the context of high integration
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Published 16 Feb 2015

Gas sensing properties of nanocrystalline diamond at room temperature

  • Marina Davydova,
  • Pavel Kulha,
  • Alexandr Laposa,
  • Karel Hruska,
  • Pavel Demo and
  • Alexander Kromka

Beilstein J. Nanotechnol. 2014, 5, 2339–2345, doi:10.3762/bjnano.5.243

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  • devices to improve the environmental and safety regulations of toxic gases in particular within buildings, underground structures, and airports. Semiconducting solid-state gas sensors can be considered as the most promising, portable, miniaturized gas sensors because of their minimal power requirements
  • ][4][5][6][7]. To date, various publications have focused on conductometric integrating gas sensors, which are able to avoid several problems of conventional gas sensors. Nevertheless, the proper choice of the sensing material plays an essential role [3][4]. Diamond is a promising sensor material and
  • , diamond gas sensors behaved with an integrator-type gas response, that is, the sensor output signal was proportional to the integrated gas flow interacting with the diamond surface. The integrating properties were verified by cyclic measurements. The sensing characteristics of the H-terminated diamond
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Published 04 Dec 2014

Electrical contacts to individual SWCNTs: A review

  • Wei Liu,
  • Christofer Hierold and
  • Miroslav Haluska

Beilstein J. Nanotechnol. 2014, 5, 2202–2215, doi:10.3762/bjnano.5.229

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  • predictability of CNFETs to further their applicability. The critical factors which impact the long term stability of device performance must be clarified more precisely. The wafer-level fabrication processes require further development to promote CNFET-based applications, such as gas sensors and superior
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Published 21 Nov 2014

Influence of stabilising agents and pH on the size of SnO2 nanoparticles

  • Olga Rac,
  • Patrycja Suchorska-Woźniak,
  • Marta Fiedot and
  • Helena Teterycz

Beilstein J. Nanotechnol. 2014, 5, 2192–2201, doi:10.3762/bjnano.5.228

Graphical Abstract
  • most widely studied and employed owing to its physicochemical properties. It features a high physicochemical stability and its electrical conductance changes predictably under the influence of various gases, which is the basis for operation of resistive gas sensors [5]. Despite the enormous number of
  • of dopants. For this reason, the electrical properties of oxide nanomaterials strongly depend on the kinetics of the processes occurring on its surface, which is extremely important during operation of chemical gas sensors [7][8]. Although the number of publications on the synthesis of oxide
  • able to reproducibly synthesize SnO2 nanoparticles, which would allow for their widespread use not only in lithium cells and gas sensors, but also in catalysis and other areas of science and technology. Tin dioxide nanoparticles are typically obtained by simple vapour phase transport methods [10][11
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Published 20 Nov 2014

Advances in NO2 sensing with individual single-walled carbon nanotube transistors

  • Kiran Chikkadi,
  • Matthias Muoth,
  • Cosmin Roman,
  • Miroslav Haluska and
  • Christofer Hierold

Beilstein J. Nanotechnol. 2014, 5, 2179–2191, doi:10.3762/bjnano.5.227

Graphical Abstract
  • nanotube properties into functional ultra-low power, highly sensitive gas sensors. Keywords: carbon nanotube field-effect transistors (CNFETs); cross-sensitivity; functionalization; gas sensors; hysteresis; low power; selectivity; self-heating; single walled carbon nanotubes; Introduction New materials
  • large shift of the threshold voltage in carbon nanotube field-effect transistors (CNFETs). SWNTs possess several properties that make them attractive candidates for gas sensors. They have all their atoms on the surface, endowing them with the highest specific surface area possible together with graphene
  • monitoring its concentration is crucial for applications such as air quality monitoring. Leveraging the NO2 sensitivity of carbon nanotubes to build highly sensitive, low-power gas sensors is therefore not only of academic, but also of great commercial interest. As such, we will focus on the NO2-SWNT system
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Published 20 Nov 2014

Room temperature, ppb-level NO2 gas sensing of multiple-networked ZnSe nanowire sensors under UV illumination

  • Sunghoon Park,
  • Soohyun Kim,
  • Wan In Lee,
  • Kyoung-Kook Kim and
  • Chongmu Lee

Beilstein J. Nanotechnol. 2014, 5, 1836–1841, doi:10.3762/bjnano.5.194

Graphical Abstract
  • also discussed. Keywords: gas sensors; NO2; UV; ZnSe nanowires; Introduction ZnSe has been widely used in fabricating short-wave optoelectronic devices [1] including blue–green laser diodes [2], tunable mid-IR laser diodes for remote sensing [3], white-light LEDs [4], continuous wave ZnSe-based laser
  • -dimensionally (1D) nanostructured, metal oxide semiconductor sensors have been studied extensively because of the associated higher sensitivity due to the high surface-to-volume ratios as compared to thin film gas sensors [8][9][10][11][12][13]. Most metal oxides exhibit some sensitivity to many gases at high
  • edge region. The corresponding selected area electron diffraction pattern (Figure 2c) exhibited two types of reflection spots assigned to wurtzite-structured ZnSe: round one from the core region and elongated one from the edge region. Performance of nanowire gas sensors Figure 3a and Figure 3b show the
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Published 22 Oct 2014

Growth and structural discrimination of cortical neurons on randomly oriented and vertically aligned dense carbon nanotube networks

  • Christoph Nick,
  • Sandeep Yadav,
  • Ravi Joshi,
  • Christiane Thielemann and
  • Jörg J. Schneider

Beilstein J. Nanotechnol. 2014, 5, 1575–1579, doi:10.3762/bjnano.5.169

Graphical Abstract
  • (CNTs) are attractive for various sensing and electronic applications. These include, but are not limited to, gas sensors [1], mechanical sensors [2], biosensors (e.g., for glucose or DNA) [3][4], and vertical interconnect access (vias) applications based on CNT bundles [5]. CNTs have also sparked
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Published 17 Sep 2014

Effects of palladium on the optical and hydrogen sensing characteristics of Pd-doped ZnO nanoparticles

  • Anh-Thu Thi Do,
  • Hong Thai Giang,
  • Thu Thi Do,
  • Ngan Quang Pham and
  • Giang Truong Ho

Beilstein J. Nanotechnol. 2014, 5, 1261–1267, doi:10.3762/bjnano.5.140

Graphical Abstract
  • of zinc oxide nanoparticles on the photoluminescence (PL) properties and hydrogen sensing characteristics of gas sensors is investigated. The PL intensity shows that the carrier dynamics coincides with the buildup of the Pd-related green emission. The comparison between the deep level emission and
  • ], compatibility with other nanodevices, and are potentially the best gas sensors. Oxides cannot easily distinguish between different types of gases, but the addition of certain noble metals as dopants can promote the gas-sensing performance [9][10][11]. Noble metal dopants in ZnO can modify the optical and
  • interstitials, Zn anti-site vacancies, and oxygen vacancies, it is of interest to find out whether Pd incorporated in ZnO significantly improves sensitivity and specificity for hydrogen [13][14]. In this work, we have successfully synthesized Pd-doped ZnO nanoparticles for an application as gas sensors by a low
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Published 13 Aug 2014

Fringe structures and tunable bandgap width of 2D boron nitride nanosheets

  • Peter Feng,
  • Muhammad Sajjad,
  • Eric Yiming Li,
  • Hongxin Zhang,
  • Jin Chu,
  • Ali Aldalbahi and
  • Gerardo Morell

Beilstein J. Nanotechnol. 2014, 5, 1186–1192, doi:10.3762/bjnano.5.130

Graphical Abstract
  • sharply reduces the band gap of insulating BNNSs. Based on these research, we have experimentally conducted several experiments on using digitally controlled pulse deposition technique to quick synthesis of BNNSs [15] as well as their applications for gas sensors [16] and electronic devices [17][18][19
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Published 31 Jul 2014

Organic and inorganic–organic thin film structures by molecular layer deposition: A review

  • Pia Sundberg and
  • Maarit Karppinen

Beilstein J. Nanotechnol. 2014, 5, 1104–1136, doi:10.3762/bjnano.5.123

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  • control of the electrical properties is required for storage capacitors, non-volatile memories as well as for transparent thin-film transistors [18][19]. Moreover, the tunability of the surface roughness is advantageous when fabricating gas sensors [20]. Over the years a number of excellent reviews
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Published 22 Jul 2014

Highly NO2 sensitive caesium doped graphene oxide conductometric sensors

  • Carlo Piloto,
  • Marco Notarianni,
  • Mahnaz Shafiei,
  • Elena Taran,
  • Dilini Galpaya,
  • Cheng Yan and
  • Nunzio Motta

Beilstein J. Nanotechnol. 2014, 5, 1073–1081, doi:10.3762/bjnano.5.120

Graphical Abstract
  • portable NO2 gas sensors. To this purpose, metal oxide materials have been investigated reaching the lowest detection threshold of 0.1 ppm [51]. The high operating temperature of these devices, in the range of 200–400 °C, is a serious drawback that makes their utilization difficult in the field, where
  • polyvinylidene fluoride membrane (0.2 μm). The precipitate was then added to water (30 mL) and filtered. The process was repeated twice to obtain dark solid GO-Cs. Finally, the gas sensors were fabricated by drop casting of the prepared GO and GO-Cs materials onto 2 × 2 mm2 transducers and then they were placed
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Published 17 Jul 2014

Gas sensing with gold-decorated vertically aligned carbon nanotubes

  • Prasantha R. Mudimela,
  • Mattia Scardamaglia,
  • Oriol González-León,
  • Nicolas Reckinger,
  • Rony Snyders,
  • Eduard Llobet,
  • Carla Bittencourt and
  • Jean-François Colomer

Beilstein J. Nanotechnol. 2014, 5, 910–918, doi:10.3762/bjnano.5.104

Graphical Abstract
  • , regardless of the nanotube length. Keywords: alignment; carbon nanotubes; decoration; gas sensors; metal nanoparticles; thermal CVD; Introduction The interest in gas sensing for reaching a widespread, continuous pollution detection and control has been growing steadily in the last decades due to the
  • based on nanomaterials have been developed to fabricate small and inexpensive gas sensors with high sensitivity and able to work at room temperature [1]. Among the possible active materials in gas sensing devices, good candidates are carbon nanotubes (CNTs), thanks to their intrinsic properties such as
  • very large surface area to volume ratio, high electron mobility, physico-chemical stability and high adsorption capability [2][3][4][5]. The use of CNTs as gas sensors was first proposed by Kong et al., who showed that a dramatic change in the electrical resistance of an individual single-walled
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Published 26 Jun 2014

An analytical approach to evaluate the performance of graphene and carbon nanotubes for NH3 gas sensor applications

  • Elnaz Akbari,
  • Vijay K. Arora,
  • Aria Enzevaee,
  • Mohamad. T. Ahmadi,
  • Mehdi Saeidmanesh,
  • Mohsen Khaledian,
  • Hediyeh Karimi and
  • Rubiyah Yusof

Beilstein J. Nanotechnol. 2014, 5, 726–734, doi:10.3762/bjnano.5.85

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  • gas sensor; graphene; Introduction There is a rapid growth in the development of sensors both in research and commercial applications. Our daily lives can be noticeably influenced by the development and advancement of miniature and/or portable gas sensors capable of accurately detecting analytes in
  • ][21]. Due to the abovementioned outstanding characteristics, graphene and CNT are being used as possible candidates for high performance gas sensors. When integrated in the sensor circuit and exposed to an analyte gas as illustrated in Figure 1, the detection signals are obtained through the changes
  • in the I–V characteristics of graphene/CNT. Operational amplifiers amplify these signals that can be converted to digital format for digital signal processing. FET-based structure As presented in Figure 2, the structure of the proposed gas sensors that use CNT/graphene as the conducting channel looks
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Published 28 May 2014

Preparation of poly(N-vinylpyrrolidone)-stabilized ZnO colloid nanoparticles

  • Tatyana Gutul,
  • Emil Rusu,
  • Nadejda Condur,
  • Veaceslav Ursaki,
  • Evgenii Goncearenco and
  • Paulina Vlazan

Beilstein J. Nanotechnol. 2014, 5, 402–406, doi:10.3762/bjnano.5.47

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  • ; Introduction Zinc oxide is widely used in various applications such as gas sensors, solar cells, antireflection coatings, varistors, surface acoustic wave devices, light emitting diodes and random lasers [1][2][3][4]. Among different processing methods, the sol–gel technique has various advantages such as cost
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Published 03 Apr 2014

Structural, optical and photocatalytic properties of flower-like ZnO nanostructures prepared by a facile wet chemical method

  • Sini Kuriakose,
  • Neha Bhardwaj,
  • Jaspal Singh,
  • Biswarup Satpati and
  • Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2013, 4, 763–770, doi:10.3762/bjnano.4.87

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  • ], gas sensors [29][30], clean energy applications [31] and UV detection [32]. Xia et al. [12] synthesized nanostructured ZnO flowers made up of bundled nanochains that could detect dopamine in the presence of L-ascorbic acid with high sensitivity and selectivity. Flower-shaped ZnO nanostructures were
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Published 18 Nov 2013

Evolution of microstructure and related optical properties of ZnO grown by atomic layer deposition

  • Adib Abou Chaaya,
  • Roman Viter,
  • Mikhael Bechelany,
  • Zanda Alute,
  • Donats Erts,
  • Anastasiya Zalesskaya,
  • Kristaps Kovalevskis,
  • Vincent Rouessac,
  • Valentyn Smyntyna and
  • Philippe Miele

Beilstein J. Nanotechnol. 2013, 4, 690–698, doi:10.3762/bjnano.4.78

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  • (3.36 eV), a high dielectric constant, a high exciton binding energy (60 meV), and a high thermal stability [1]. Hence it is an important material for different applications in devices such as gas sensors [2], biosensors [3], transducers [4], solar cells [5][6][7], electronic and optoelectronic
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Published 28 Oct 2013

Functionalization of vertically aligned carbon nanotubes

  • Eloise Van Hooijdonk,
  • Carla Bittencourt,
  • Rony Snyders and
  • Jean-François Colomer

Beilstein J. Nanotechnol. 2013, 4, 129–152, doi:10.3762/bjnano.4.14

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  • to the CNT tips. The polymer-masking methodology was also used to manufacture highly efficient gas sensors [147]. VA-CNTs were embedded in a polymer matrix (e.g., poly(vinyl acetate) or polyisoprene) and two gold electrodes were sputtered onto the surface of the sample. A change of the charge
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Published 22 Feb 2013

Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNOx-SCR

  • Thomas Simons and
  • Ulrich Simon

Beilstein J. Nanotechnol. 2012, 3, 667–673, doi:10.3762/bjnano.3.76

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  • also applied in gas sensors [12][13][14][15][16][17]. They are proton conductors due to the mobility of the charge-compensating protons. By means of impedance spectroscopy (IS) [18][19][20][21] and quantum chemical calculations on H-ZSM-5 [22][23], we showed in previous works that protons can move
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Published 26 Sep 2012
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