Article
Chemistry, Inorganic & Nuclear
Amruta B. Nagare, Namdev S. Harale, Suprimkumar D. Dhas, Umesh V. Shembade, Suhas R. Ghatage, Pramod S. Patil, Annasaheb V. Moholkar
Summary: Nanogranular polypyrrole (PPy) thin films were successfully synthesized by in-situ oxidative polymerization and drop casting method. The films exhibited agglomerated granular-like morphology with high roughness. The optimized PPy thin film gas sensor showed excellent response and stability towards NO2 gas even at low concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Merel J. Lefferts, Ben Armitage, Krishnan Murugappan, Martin R. Castell
Summary: This study demonstrates the use of PEDOT conducting polymer percolation networks for sensitive and reversible NO2 sensing. By adjusting the polymerization and doping conditions, control over sensing behavior is achieved, resulting in reversible NO2 sensors with higher sensitivity compared to traditional thin film sensors. A detection limit of 907 +/- 102 ppb was achieved.
Article
Chemistry, Multidisciplinary
Zhicheng Cai, Jiho Park, Doyeon Jun, Sunghoon Park
Summary: Porous TiO2 nanoparticle-embedded In2O3 nanofibers were synthesized for fabricating room temperature nitrogen dioxide gas sensors. The TiO2/In2O3 nanofibers exhibited higher response, shorter response and recovery times, better reproducibility, and improved selectivity to NO2 compared to pure In2O3 nanofibers. The enhanced NO2 sensing performance of the composite can be attributed to the formation of the TiO2/In2O3 n-n heterojunction, porous structure of the nanofibers, enhanced light absorption, and large number of O vacancies.
Article
Chemistry, Multidisciplinary
Takashi Ikuta, Takashi Tamaki, Hiroshi Masai, Ryudai Nakanishi, Kitaro Endo, Jun Terao, Kenzo Maehashi
Summary: Metalloporphyrin-modified graphene field-effect transistors (FETs) were fabricated for trace detection of NO2, with Mg-porphyrin modification showing significant response compared to other porphyrins. This study demonstrates the potential for rapid, easy, and selective detectability of NO2 using Mg-porphyrin-modified graphene FETs.
NANOSCALE ADVANCES
(2021)
Review
Automation & Control Systems
Patigu Maimaiti, Patima Nizamidin, Nuerguli Kari, Buayishamu Kutilike, Abliz Yimit
Summary: This study developed a TSPP-gamma-Fe2O3-OWG sensor for detecting EDA. Spin-coating technique was used to fabricate the sensors, and their response was characterized based on UV-vis absorption spectra and OWG sensor intensity. The combination of TSPP with maghemite improved device response, with twice the response of acid-treated TSPP-OWG sensor and 30 times the response of pure gamma-Fe2O3-OWG sensor. The composite sensor exhibited a linear response to EDA gas in the concentration range of 0.1-1000 ppm with high sensitivity and selectivity.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2023)
Article
Chemistry, Applied
Elizaveta V. Ermakova, Elena O. Koroleva, Alexander V. Shokurov, Vladimir V. Arslanov, Alla Bessmertnykh-Lemeune
Summary: Dual-channel optical sensors for Hg2+ ions were prepared using the Langmuir-Schaefer method, displaying high selectivity and reusability for detecting mercury(II) ions at concentrations as low as 10(-8) M (2 ppb).
Article
Chemistry, Analytical
Dong Wang, Chenshuai Han, Chunxiang Zheng, Hairui Fang, Dongfu Xu, Hongbin Zhao
Summary: TiO2 QDs-decorated In2O3 composite was synthesized via electrospinning, and SEM and TEM showed the self-assembly of In2O3 nanotubes with uniform dispersion of TiO2 QDs. XPS results revealed increased oxygen deficiency proportion by TiO2 QDs. The sensor based on IT1 sample had a 7.76 times higher response to 10 ppm NO2 (214.3) compared to IT0. The sensor exhibited fast response/recovery characteristics, low detection limit, and high moisture resistance. The enhanced sensing performance was attributed to electronic and geometrical effects. The method of QDs-induced oxygen deficiency and in-depth study of the sensing mechanism provide new perspectives for NO2 gas sensor construction.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Chengjiu Zhao, Xuezheng Guo, Yanqiao Ding, Chengyao Liang, Bingsheng Du, Wen Niu, Weijie Qu, Yijie Shi, Shuren Cong, Gang Meng, Yong He
Summary: A 2D/0D SnSe2/TiO2 composite is used as a sensing material for the detection of ppb-level NO2 at room temperature in complex gas environments. The composite sensor exhibits good sensitivity, specificity, and long-term stability, as well as the ability to accurately detect NO2 in the presence of interfering gases.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Manreet Kaur Sohal, Aman Mahajan, Sahil Gasso, R. K. Bedi, Ravi Chand Singh, A. K. Debnath, D. K. Aswal
Summary: In this study, yttrium-incorporated tin oxide thin film gas sensors were developed for sub-ppb level detection of NO2 at room temperature, showing high sensing response, selectivity, and stability, while being insensitive to humidity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Yuan-Chang Liang, Yu-Wei Hsu
Summary: In this study, a two-layered thin-film structure consisting of a dispersed nanoscaled Ag2O phase and SnO2 layer (SA) and a mono-composite film layer (CSA) consisting of a nanoscale Ag2O phase in the SnO2 matrix were designed and fabricated for NO2 gas sensor applications. Both SA and CSA thin films exhibited enhanced gas-sensing responses toward low-concentration NO2 gas.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Analytical
Buayishamu Kutilike, Kalibinue Yiming, Gulimire Tuerdi, Renagul Abdurahman, Patima Nizamidin, Abliz Yimit
Summary: Composite thin film-based OWG sensors show higher sensitivity than single film-based OWG sensors, making them useful in the detection of trace gases. The THPP-BCP/TiO2-OWG sensor exhibited excellent selectivity and remarkable response to EDA gas at a concentration of < 1 ppb at room temperature, with fast response and recovery times. The combination of THPP-BCP thin film and TiO2 gel film provides a powerful platform for highly sensitive, specific, and stable OWG sensors in the detection of trace gases.
ANALYTICAL SCIENCES
(2023)
Article
Chemistry, Analytical
Wenlong Yang, Chengjiu Zhao, Bingsheng Du, Rong Wu, Xiaofang Lai, Yong He, Jikang Jian
Summary: A high-performance room temperature NO2 gas sensor based on tin selenide nanosheet arrays films has been developed, which can quickly respond to different concentrations and has high selectivity and repeatability.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Maloy Das, Amit Kumar Shringi, Mahesh Kumar
Summary: Metal oxide-based thin-film sensors have been widely studied and commercialized for gas sensing applications, but they suffer from poor sensing response and high-temperature operation. In this study, a MoS2 decorated alpha-Fe2O3 thin-film-based gas sensor was demonstrated, which showed improved response and high sensitivity and selectivity towards NO2 gas.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Kailasa S. Ganapathi, Manmeet Kaur, M. Shaheera, Ankita Pathak, S. C. Gadkari, A. K. Debnath
Summary: This study utilized SILAR technique to prepare pristine ZnO thin films for highly sensitive, selective, and rapid detection of sub-ppm level NO2. The synthesized films exhibited high sensitivity and selectivity to NO2 with fast response and recovery times. XPS studies revealed interactions of NO2 with both adsorbed and lattice oxygen, while optical studies confirmed the existence of defects in the ZnO films contributing to their superior sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Jeong Ik Lee, Miyeon Kim, Kyoung Chul Park, Chang Yeon Lee, Yeong Don Park
Summary: This study examines the properties of Fe porous coordination network 222 (PCN-222) and its potential as an analyte interacting material inserted into a polymer active layer. The electrical characteristics of PCN-222 improve the field-effect mobility in polythiophene transistors, and transistor-based sensors with PCN-222/polythiophene blend films show significantly enhanced nitrogen dioxide sensing characteristics due to the porous structures and large specific surface area of PCN-222.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jaime del Moral, Laura Montes, Victor Joaquin Rico-Gavira, Carmen Lopez-Santos, Stefan Jacob, Manuel Oliva-Ramirez, Jorge Gil-Rostra, Armaghan Fakhfouri, Shilpi Pandey, Miguel Gonzalez del Val, Julio Mora, Paloma Garcia-Gallego, Pablo Francisco Ibanez-Ibanez, Miguel Angel Rodriguez-Valverde, Andreas Winkler, Ana Borras, Agustin Rodriguez Gonzalez-Elipe
Summary: The use of acoustic waves for de-icing and anti-icing purposes shows promising potential, as it provides a synergistic effect when combined with surface modifications. Experiments conducted in laboratory and icing wind tunnel settings demonstrate the real-time monitoring capabilities of acoustic wave devices in icing processes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Francisco G. Moscoso, Carla Queiros, Paula Gonzalez, Tania Lopes-Costa, Ana M. G. Silva, Jose M. Pedrosa
Summary: We have developed a carboxylated pyrrolidine-fused chlorin as a fluorescent probe for the determination of glutathione. This stable and highly emissive molecule can be easily obtained from a porphyrin through a cycloaddition approach. The fluorescence of the probe is quenched by Hg(II) ions, but a significant fluorescence turn-on is observed in the presence of low concentrations of GSH. The sensing molecule exhibited selectivity and a low detection limit under physiological conditions.
Article
Chemistry, Analytical
Javier Roales, Francisco G. G. Moscoso, Alejandro P. P. Vargas, Tania Lopes-Costa, Jose M. Pedrosa
Summary: We propose a low-cost and portable color measuring device that can provide similar results to laboratory spectrophotometers. The prototype is based on an RGB color sensor connected to a Raspberry Pi and mounted on custom sample holders for reflectance or transmittance measurements. The device was able to accurately monitor the color change of sensing devices when exposed to analytes and showed versatility in measuring samples with different characteristics.
Article
Nanoscience & Nanotechnology
Jorge Gil-Rostra, Javier Castillo-Seoane, Qian Guo, Ana Belen Jorge Sobrido, Agustin R. Gonzalez-Elipe, Ana Borras
Summary: This work proposes a new architecture of photoelectrodes consisting of supported multishell nanotubes fabricated by a soft-template approach. The obtained NT electrodes have a large electrochemically active surface and outperform the efficiency of equivalent planar-layered electrodes by more than one order of magnitude. The characteristics of the WO3/BiVO4 Schottky barrier heterojunction control the NT electrode efficiency, which depends on the BiVO4 outer layer thickness and the incorporation of the CoPi electrocatalyst, as demonstrated by thorough electrochemical analysis.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Gerardo Asensio, Ana M. Hernandez-Arriaga, Marcela Martin-del-Campo, M. Auxiliadora Prieto, Agustin R. Gonzalez-Elipe, Luis Rojo, Blanca Vazquez-Lasa
Summary: The accumulation of bacteria over implant surfaces is the main cause of failure, and the development of antimicrobial surfaces is crucial. Additionally, the durability and mechanical performance of implants are determined by their osseointegration capacity and infection prevention. Therefore, bioactive surfaces are being researched to improve implant osseointegration and infection prophylaxis.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
A. M. Alcaide, G. Regodon, F. J. Ferrer, V Rico, R. Alvarez, T. C. Rojas, A. R. Gonzalez-Elipe, A. Palmero
Summary: The formation of monoclinic VO2 crystal domains at low temperatures in nanocolumnar vanadium/oxygen thin films deposited via magnetron sputtering is analyzed. The synthesis involved depositing amorphous nanocolumnar VO1.9 thin films at room temperature and annealing them at temperatures between 250 - 330 ? in an oxygen atmosphere. The nanocolumnar structures exhibited a thermochromic transition at 47 ? (for annealing at 270 ?) and 58 ? (for annealing at 280 and 290 ?), resulting in a significant drop in optical transmittance in the infrared region.
Article
Chemistry, Multidisciplinary
Paula Navascues, Juan Garrido-Garcia, Jose Cotrino, Agustin R. Gonzalez-Elipe, Ana Gomez-Ramirez
Summary: This study investigates the synthesis of ammonia using plasma-catalysis and examines the role of various catalyst materials. The results show that while ruthenium particles have some catalytic activity under certain conditions, they do not significantly improve the yield and energy efficiency of ammonia synthesis. The ferroelectric material and the alumina coating play important roles in regulating discharge and cooling the plasma, respectively.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Rafael Alvarez, Guillermo Regodon, Hiedra Acosta-Rivera, Victor Rico, German Alcala, Agustin R. Gonzalez-Elipe, Alberto Palmero
Summary: This paper studied the morphology and void connectivity of thin films grown by magnetron sputtering deposition at oblique geometries. A well-tested thin film growth model was used, along with experimental data, to assess the features of these layers. The film morphology and pore topology varied significantly with the growth conditions, which were linked to the different collisional transport of sputtered species in the plasma gas. Four different film morphologies were identified, and their porous network characteristics were described, explaining their potential applications in electrochromic sensors or infiltration with nanoparticles.
Article
Materials Science, Multidisciplinary
Stefan Jacob, Shilpi Pandey, Jaime Del Moral, Atefeh Karimzadeh, Jorge Gil-Rostra, Agustin R. Gonzalez-Elipe, Ana Borras, Andreas Winkler
Summary: This study successfully demonstrates the de-icing functionality of large areas covered with thick layers of glaze ice using nanoscale activation by surface acoustic waves. The method shows potential for practical applications in various industries.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Felix Carrascoso, Hao Li, Jose M. Obrero-Perez, Francisco J. Aparicio, Ana Borras, Joshua O. Island, Angel Barranco, Andres Castellanos-Gomez
Summary: By using an adamantane plasma polymer pinning layer, we achieve unprecedented crystal strains of 2.8% in monolayer molybdenum disulfide. The strain gauge factors for the A and B excitons of monolayer MoS2 are reported as -99.5 meV/% and -63.5 meV/%, respectively, with a 50 nm adamantane capping layer. Photoluminescence and Raman measurements on the same samples confirm these results. Overall, our study demonstrates that adamantane polymer is an exceptional capping layer for transferring substrate-induced strain to a 2D layer and achieving higher levels of crystal strain.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Chemistry, Multidisciplinary
F. G. Moscoso, L. M. Rodriguez-Albelo, A. R. Ruiz-Salvador, Tania Lopes-Costa, J. M. Pedrosa
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
V. Rico, G. F. Regodon, A. Garcia-Valenzuela, A. M. Alcaide, M. Oliva-Ramirez, T. C. Rojas, R. Alvarez, F. J. Palomares, A. Palmero, A. R. Gonzalez-Elipe
Summary: In this study, a novel methodology of plasma-assisted thin film structuration was proposed by combining piezoelectric AWs and plasmas during the growth of a thin film. SiO2 and SiOx (x<2) thin films were deposited by magnetron sputtering at oblique angles (MS-OAD) on an electro-acoustically excited LiNbO3 piezoelectric substrate under resonant conditions. The resulting films exhibited 2D patterned microstructure with submillimeter size intermingled zones, which replicated the distribution of polarization potential on the AW activated substrate immersed in the plasma. The main mechanism responsible for the appearance of domains with different morphology and chemical composition was found to be the focused impingement of Ar+ plasma ions on certain regions of the substrate. The discussed the general character of this patterning process, the underlying physics, and its possibilities to tailor the composition and microstructure of dielectric thin film materials.
