Modeling and simulation of carbon-nanocomposite-based gas sensors

• Roopa Hegde,
• Punya Prabha V,
• Shipra Upadhyay and
• Krishna S B

Beilstein J. Nanotechnol. 2025, 16, 90–96, doi:10.3762/bjnano.16.9

• using the nanocomposite materials which in turn enhances the sensitivity of the gas sensors. Keywords: CO gas; COMSOL Multiphysics; gas sensor; surface coverage; SWCNT/PEDOT:PSS; Introduction The field of nanotechnology has brought significant advancements in various scientific and engineering

• effective, often face limitations such as poor sensitivity, slow response times, and high-power consumption. These limitations restrict their widespread use and make the development of more efficient, sensitive, and cost-effective CO gas-sensing solutions necessary. The unique properties of carbon

• nanocomposites, like high surface area, excellent electrical conductivity, and chemical stability, make them ideal candidates for the development of high-performance CO gas sensors. Carbon-nanocomposite gas sensors find their application in detecting pollutants such as nitrogen dioxide (NO2), sulfur dioxide (SO2

Ion-induced surface reactions and deposition from Pt(CO)₂Cl₂ and Pt(CO)₂Br₂

• Mohammed K. Abdel-Rahman,
• Patrick M. Eckhert,
• Atul Chaudhary,
• Johnathon M. Johnson,
• Jo-Chi Yu,
• Lisa McElwee-White and
• D. Howard Fairbrother

Beilstein J. Nanotechnol. 2024, 15, 1427–1439, doi:10.3762/bjnano.15.115

• another 3 h. After the reactor was cooled to room temperature, the reaction mixture was stirred overnight. The unreacted CO gas was then released, and the reactor was backfilled with N2. The Parr reactor was brought into the glove box and opened inside. The DCE solvent and the yellow-brown suspension were

Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• study, Kante et al. prepared SnO2 films with fractal morphology by an electrochemical method with a subsequent oxidation process [68]. Both groups tested the films for CO gas sensing at different temperatures. Figure 8a–d shows the SEM images of SnO2 thin films on a Si(100) substrate obtained by Chen

• Elsevier. This content is not subject to CC BY 4.0. Density and dimension of SnO2 fractal films. (a–d) SEM images and (e) CO gas sensing behavior of SnO2 thin films prepared on Si(100) substrate at different temperatures (A: 300 °C, B: 350 °C, C: 400 °C, D: 450 °C). (f, g) Influence of the temperature on D

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

• Ilka Simon,
• Alexandr Savitsky,
• Rolf Mülhaupt,
• Vladimir Pankov and
• Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

• /WO3 composite and CO gas, a response time (Tres) of 7 min and a recovery time (Trec) of 2 min was determined. Keywords: gas sensing; magnetic measurements; nickel nanoparticles; reduced graphene oxide; tungsten oxide; Introduction Toxic gases as well as volatile organic compounds (VOC) are known air

• graphene oxide. Low concentrations of acetone (3500 ppm) were better detected by the Ni@rGO/WO3 composite than the higher concentration of 35,000 ppm. For CO gas, the response time and the recovery time were Tres ≈ 7 min and Trec ≈ 2 min, respectively. The facile preparation of nickel nanoparticles

Review of advanced sensor devices employing nanoarchitectonics concepts

• Katsuhiko Ariga,
• Tatsuyuki Makita,
• Masato Ito,
• Taizo Mori,
• Shun Watanabe and
• Jun Takeya

Beilstein J. Nanotechnol. 2019, 10, 2014–2030, doi:10.3762/bjnano.10.198

• processes, such as catalytic reactions and fluorescence quenching, often improves sensor capabilities through component nanoarchitectonics. Imanaka and co-workers used a combustion process induced by a precious-metal-free CeO2–ZrO2–ZnO catalyst for CO gas detection [87]. The semiconducting (p-type) La2CuO4

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

• Vadim B. Platonov,
• Marina N. Rumyantseva,
• Alexander S. Frolov,
• Alexey D. Yapryntsev and
• Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

• semiconductor materials: where CO(gas), NH3(gas) are molecules of carbon monoxide and ammonia in the gas phase, is a particle of chemisorbed oxygen, e− is an electron released into the conduction band; CO2(gas), N2(gas), H2O(gas) are the molecules of the reaction products desorbed from the surface of the

Selective gas detection using Mn₃O₄/WO₃ composites as a sensing layer

• Yongjiao Sun,
• Zhichao Yu,
• Wenda Wang,
• Pengwei Li,
• Gang Li,
• Wendong Zhang,
• Lin Chen,
• Serge Zhuivkov and
• Jie Hu

Beilstein J. Nanotechnol. 2019, 10, 1423–1433, doi:10.3762/bjnano.10.140

• ) CO at 210 °C. (a, c, e) Response trends with respect to concentration and (b, d, f) corresponding log(S − 1) vs log(C) of the 3 atom % Mn3O4/WO3 composite based gas sensors toward (a,b) H2S, (c,d) NH3 and (e,f) CO. Gas selectivity analysis of 3 atom % Mn3O4/WO3 composites at (a) 90 °C, (b) 150 °C and

Surface-plasmon-enhanced ultraviolet emission of Au-decorated ZnO structures for gas sensing and photocatalytic devices

• T. Anh Thu Do,
• Truong Giang Ho,
• Thu Hoai Bui,
• Quang Ngan Pham,
• Hong Thai Giang,
• Thi Thu Do,
• Duc Van Nguyen and
• Dai Lam Tran

Beilstein J. Nanotechnol. 2018, 9, 771–779, doi:10.3762/bjnano.9.70

• operating temperature of 120 °C. Both ZnO and Au NP/ZnO sensors exhibit too low sensitivity for CO gas, while the presence of decorated Au on the surface of ZnO improves the sensitivity for n-propane (C3H8) detection, which was enhanced from 13.6 to 86.3 times at an operating temperature of 160 °C. The

Low-temperature CO oxidation over Cu/Pt co-doped ZrO₂ nanoparticles synthesized by solution combustion

• Amit Singhania and
• Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 1546–1552, doi:10.3762/bjnano.8.156

• catalytic activity and stability of Pt(1%)–Cu(1%)–ZrO2 nanoparticles is due to presence of large oxygen vacancies, high specific surface area and small particle size. This shows that the Pt/Cu co-doped ZrO2 is an attractive catalytic material to oxidize poisonous CO gas at very low temperatures

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

• and NH3 gases. The measurements were performed at room temperature under UV illumination. The horizontal bars indicate the time intervals of gas exposure. The inset depicts a response to 100 ppm CO gas. Response of the graphene sensor to different concentrations of NH3 gas before (dashed line) and

Thin SnO_x 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

• concentration of the added gas species is improved [18]. The second best response was achieved for CO gas with a value of ΔΔ = 9.5° for 100 ppm and a measurable resolution at 10 ppm with ΔΔ = 1.2°. The response is slightly better than in the prior experiment which was ascribed to the higher amount of adsorbed

Nanoparticle shapes by using Wulff constructions and first-principles calculations

• Georgios D. Barmparis,
• Zbigniew Lodziana,
• Nuria Lopez and
• Ioannis N. Remediakis

Beilstein J. Nanotechnol. 2015, 6, 361–368, doi:10.3762/bjnano.6.35

• in gray. Left: in vacuum or inert environment (28 nm in diameter, 539500 atoms, 2980 of which are step-edge atoms; (111) faces occupy 62% of the total area). Center: In low-pressure CO gas (27 nm in diameter, 533600 atoms, 7610 of which are step-edge atoms; (321) faces occupy 61% of the total area

A facile synthesis of a carbon-encapsulated Fe₃O₄ nanocomposite and its performance as anode in lithium-ion batteries

• Raju Prakash,
• Katharina Fanselau,
• Shuhua Ren,
• Tapan Kumar Mandal,
• Christian Kübel,
• Horst Hahn and
• Maximilian Fichtner

Beilstein J. Nanotechnol. 2013, 4, 699–704, doi:10.3762/bjnano.4.79

• reactor to cool down to room temperature, the remaining pressure was released carefully. A dry fine black powder of [Fe3O4–C] produced was collected and used directly without any further treatment. The reaction precedes in two steps: in the first step, Fe(CO)5 decomposes to form Fe and CO gas {Fe(CO)5(g