Article
Chemistry, Multidisciplinary
Sonia Freddi, Daniele Perilli, Luca Vaghi, Mauro Monti, Antonio Papagni, Cristiana Di Valentin, Luigi Sangaletti
Summary: This study presents an easy and cost-effective method to functionalize graphene through thermally activated dimerization of 2,5-diaryltetrazoles, and introduces the use of tetrazoles to prepare graphene-based chemiresistors. The tests show that this method is sensitive to ammonia and the sensors perform better than bare graphene.
Article
Chemistry, Analytical
Jung -Hui Tsai, Jing-Shiuan Niu, Wei-Che Shao, Wen-Chau Liu
Summary: A new chemiresistive-type ammonia gas sensor based on gallium oxide thin film functionalized with platinum nanoparticles is developed. The sensor exhibits p-type conductive resistor and high sensing response ratio, making it suitable for high-performance ammonia sensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Ravindra Jha, Aman Nanda, Navakanta Bhat
Summary: By loading MoSe2 nanosheets on RGO sheets, the sensitivity and response time of the ammonia gas sensor were significantly improved in this study. The nanocomposite sensor showed a detection limit of 300 ppb, with a responsivity 2.6 times higher than that of the pure RGO sensor, and ultra-low power consumption.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Sagar Sardana, A. K. Debnath, D. K. Aswal, Aman Mahajan
Summary: The present study investigates the use of WS2/MXene composite-based chemiresistive sensor to overcome the unsatisfactory sensing performance of Ti3C2Tx MXene-based sensors. The sensor exhibited high response rates to NH3 and NO2 and showed opposite transient response curves for NH3 and NO2. Density functional theory simulations showed the high adsorption energies of WS2/MXene surface towards NH3 and NO2. The sensor also demonstrated high resilience to humidity and the possibility of practical application of dual sensing using single sensing material was shown.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Tao Wei, Wei Li, Jie Zhang, Xiaoling Xie
Summary: Forming composite nanofibers of terbium oxide (Tb2O3) and zinc oxide (ZnO) through electrospinning and annealing resulted in a gas sensor with excellent sensing performance for nitric oxide (NO) gas. The Tb2O3/ZnO composite nanofiber exhibited a high response to 1 ppm NO gas at 180 degrees C, with low response to other interference gases. The sensor also showed good repeatability and long-term stability, indicating the promising potential of ZnO for real applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Lude Wang, Feicui Xu, Chen Zhang, Swelm Wageh, Omar A. A. Al-Hartomy, Bin Zhang, Tingqiang Yang, Han Zhang
Summary: Transition metal dichalcogenides (TMDs) have great potential for chemiresistive gas sensors. However, TMD alloys with tunable electronic structures have not been extensively studied in gas sensing. In this study, Mo0.5W0.5S2 alloy nanoparticles (NPs) were prepared and tested for ammonia sensing. The results showed that the Mo0.5W0.5S2 NPs exhibited good response to ammonia with a low detection limit of 500 ppb. The sensor also demonstrated excellent stability and selectivity to ammonia in the presence of interferences.
Article
Chemistry, Analytical
Srinivasulu Kanaparthi, Shiv Govind Singh
Summary: A method was proposed to discriminate three gases using a single metal oxide gas sensor with temperature sweeping to reduce power consumption. This approach significantly decreases power consumption compared to traditional sensors and opens the way for widespread use in practical applications where reducing power consumption is necessary.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Xueyan Wang, Baoyu Huang, Xiaofang Wu, Ding Gu, Xiaogan Li
Summary: Through sulfonation and incorporation of WS2 nanoflakes, the sensitivity of rGO-based ammonia sensor at room temperature has been significantly improved. The S-rGO/WS2 sensor exhibits enhanced response signals to ammonia and significantly shortened response/recovery time compared to previous rGO/WS2 sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Review
Biochemistry & Molecular Biology
Li Fu, Shixi You, Guangjun Li, Xingxing Li, Zengchang Fan
Summary: The application of semiconductor metal oxides in chemiresistive methane gas sensors has shown significant progress, with improvements in sensitivity, selectivity, and stability. Challenges include issues with sensitivity, selectivity, operating temperature, stability, and response times. Future research should focus on addressing these challenges and exploring green manufacturing practices.
Review
Chemistry, Multidisciplinary
Run Zhang, Cong Qin, Hari Bala, Yan Wang, Jianliang Cao
Summary: Gas-sensing technology, particularly spinel ferrite-based gas sensors, has gained attention for environmental safety and human health concerns. This review article provides an overview of recent developments in spinel-ferrite gas sensors, focusing on the sensing mechanism, unique properties, and advancements in microstructures, element doping, and heterostructure materials. The integration of spinel ferrite with other semiconductors shows potential for enhancing selectivity and overall sensor performance. The combination of spinel ferrite and semiconductors can improve the selectivity, stability, and sensing performance of gas sensors, which is crucial for practical applications. The review highlights the potential of spinel-ferrite-based gas sensors and their importance in early detection and warning systems.
Review
Nanoscience & Nanotechnology
Peresi Majura Bulemo, Jun Young Cheong
Summary: This review article discusses the potential and importance of nanostructured semiconducting metal oxides (SMOs) in gas-sensing applications, focusing on the control of porosity and its impact on gas sensing performance.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Seyeon Park, Peresi Majura Bulemo, Won-Tae Koo, Jaehyun Ko, Il-Doo Kim
Summary: By utilizing solid-solution doping and catalytic metal nanoparticles, superior acetylene sensing capabilities were achieved through porous metal oxide nanofibers. The high porosity of the metal oxide nanofibers, prepared using electrospinning and sacrificial templating, was essential for high gas permeability and active sites. Ga-doped ZnO porous NFs functionalized with Pt catalysts demonstrated the highest C2H2 sensing responses with exceptional selectivity and stability against interfering gases.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Review
Chemistry, Inorganic & Nuclear
Ruksana Shaik, Roopa Kishore Kampara, Amit Kumar, Chandra Shekhar Sharma, Mahesh Kumar
Summary: With industrial escalation, air toxicity increases, leading to a decline in air quality. Monitoring environmental pollutants is essential for protecting animals and humans, as dangerous gases like NH3, H2S, CO2, etc., can cause fatal diseases.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Physics, Condensed Matter
S. Keerthana, M. B. Arthina Titlin, C. Ravi Dhas, R. Venkatesh, D. Arivukarasan, K. C. Mercy Gnana Malar
Summary: Copper oxide (CuO) gas sensors were fabricated on a glass substrate using nebulizer spray pyrolysis with different cationic precursors. XRD analysis confirmed the monoclinic structure of the CuO films, and SEM analysis revealed a porous morphology for the copper acetate precursor solution.The films exhibited a near stoichiometric ratio of copper and oxygen according to EDAX and XPS analysis. The temperature-dependent resistivity measurements were conducted using the four-probe technique.Evaluation of the optical properties showed an optical band gap between 1.5 eV and 1.9 eV, and photoluminescence emission peak at 628 nm. The A: CuO film achieved a maximum average lifetime (τavg) of 0.495 ns based on TRPL analysis.The A: CuO sensor with a porous structure displayed high sensitivity, fast response, and recovery speed for acetone, ethanol, and toluene gas detection at room temperature (16 s/47 s, 9 s/12 s, and 6 s/38 s).
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Ruijie Zhang, Yanjie Wang, Jing Li, Hongchao Zhao, Yuhang Wang, Yong Zhou
Summary: In this study, a composite sensor for room temperature ammonia detection was developed by incorporating cellulose nanofibers into PEDOT:PSS. The sensor exhibited high sensitivity, selectivity, and stability, with fast response and minimal baseline drift. Additionally, the sensor showed more than twofold response enhancement in the presence of humidity, and demonstrated flexible and bending-tolerant characteristics.
Article
Chemistry, Physical
I. Jennifer Gomez, Manuel Vazquez Sulleiro, Nadezda Pizurova, Antonin Bednarik, Petr Lepcio, David Holec, Jan Preisler, Lenka Zajickova
Summary: Carbon dots (CDs) exhibit similar photophysical features despite different synthesis protocols. Understanding the structure is crucial for achieving desired properties. This study provides insight into the structure and formation of CDs, identifying the presence of molecular fluorophore species. Density functional theory calculations support the spontaneous formation of a compact network of molecular species. Additionally, the study comprehensively investigates the photoluminescence properties, paving the way for CD-based logic gate fluorescent sensors.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zhongyou Peng, Alexander G. Bannov, Shulong Li, Yuting Huang, Ling Tang, Licheng Tan, Yiwang Chen
Summary: This study reports a new method for synthesizing phosphorus and nitrogen dual-doped hierarchical ordered porous carbon (PN-HOPC) with matchable pore size and adequate active sites, which is significant for large-scale Zn2+ storage. The optimized PN-HOPC exhibits outstanding Zn2+ storage capabilities in terms of high capacity, superb energy density, and ultralong lifespan.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
Martina Buchtelova, Lucie Blahova, David Necas, Petra Krizkova, Jana Bartosikova, Jirina Medalova, Zdenka Kolska, Dirk Hegemann, Lenka Zajickova
Summary: Plasma polymers can enhance the bio-applicability of material surfaces, but the mechanism of cell adhesion to different functional groups in these polymers is still not fully understood.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Polymer Science
Lucie Janu, Eva Dvorakova, Katerina Polaskova, Martina Buchtelova, Petr Rysanek, Zdenek Chlup, Tomas Kruml, Oleksandr Galmiz, David Necas, Lenka Zajickova
Summary: Excellent adhesion between electrospun nanofiber and textile support is crucial in various bioapplications, such as wound dressing development. Different plasma modifications were compared for their effect on adhesion, with low-pressure oxygen treatment showing the strongest improvement. The synergy of treatment homogeneity, surface functional groups, and wettability contributed to the enhanced adhesion.
Article
Chemistry, Multidisciplinary
Aleksandr I. Aparnev, Anton V. Loginov, Nikolai Uvarov, Valentina Ponomareva, Irina Bagryantseva, Anton Manakhov, Abdulaziz S. Al-Qasim, Valeriy V. Golovakhin, Alexander G. Bannov
Summary: The proton conductivity and structural properties of (1-x)CsH2PO4-xZnSnO(3) composites were investigated. Zinc stannate ZnSnO3 was synthesized and used as a matrix for the formation of the composite electrolytes. The study showed an increase in proton conductivity in the composites, reaching a maximum at x = 0.2, and then decreasing due to the percolation effect. Zinc stannate was demonstrated to be a potential additive in other composite solid electrolytes.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Pavel B. Kurmashov, Arina V. Ukhina, Anton Manakhov, Arkady V. Ishchenko, Evgenii A. Maksimovskii, Alexander G. Bannov
Summary: This study investigated the synthesis of a 90% Ni/Al2O3 catalyst through solution combustion synthesis using various fuels. Catalysts with a high content of nickel were obtained by combusting mixtures of Ni(NO3)2·6H2O and Al(NO3)3·9H2O with different fuels. The efficiency of the fuels and their effect on the structure, properties, and catalytic activity of the catalysts were evaluated. The catalyst was used for methane decomposition to produce hydrogen and carbon nanofibers, with the highest activity achieved when citric acid was used as the fuel.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
I. Jennifer Gomez, Karina Ovejero-Paredes, Jose Manuel Mendez-Arriaga, Nadezda Pizurova, Marco Filice, Lenka Zajickova, Sanjiv Prashar, Santiago Gomez-Ruiz
Summary: Due to their water solubility, stability, non-toxicity, and photoluminescence, nitrogen-doped graphene quantum dots (NGQDs) have potential for delivering organotin(IV) compounds in cancer therapy. Two nanosystems were developed by grafting organotin fragments and 4-formylbenzoic acid onto the surface of NGQDs. In vitro tests demonstrated high cytotoxicity against breast cancer cells (MDA-MB-231) and minimal effects on non-cancer cells (HEK293T), with successful uptake and release of the metallodrug in cancer cells.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
I. Jennifer Gomez, Miguel Diaz-Sanchez, Nadezda Pizurova, Lenka Zajickova, Sanjiv Prashar, Santiago Gomez-Ruiz
Summary: This work reports a facile synthesis method of hybrids of F-doped TiO2 and N-doped graphene quantum dots (F-TiO2@N-GQDs), which show efficient photocatalytic properties in light-driven pollutant reduction.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Materials Science, Coatings & Films
Anjar Anggraini Harumningtyas, Tomoko Ito, Michiro Isobe, Lenka Zajickova, Satoshi Hamaguchi
Summary: Molecular dynamics simulations were used to study the formation of amine in carbon-based polymer films deposited by plasma enhanced chemical vapor deposition (PECVD). The study found that even under ideal conditions, the content of primary amine is relatively small.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Physics, Applied
Katerina Polaskova, Alp Ozkan, Milos Klima, Zdenka Jenikova, Madhuwanthi Buddhadasa, Francois Reniers, Lenka Zajickova
Summary: Plasma treatment is a widely-used method to improve the surface properties of polypropylene (PP), but the efficiency of different plasma discharges is rarely compared. In this study, the differences in PP treated by three arc-based commercial plasma jets (PT-RPJ, AFS-PJ, ST-GA) and a low-temperature RF plasma slit jet (RF-PSJ) were discussed. It was found that the AFS-PJ had a different reactive species composition dominated by nitrogen oxides, leading to higher thermal loads and surface damage. On the other hand, PT-RPJ and ST-GA had higher oxygen and nitrogen concentrations on the PP surface, resulting in higher adhesion strength on PP-aluminum joints.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Chemistry, Analytical
Nikita I. Lapekin, Pavel B. Kurmashov, Tatyana V. Larina, Yurii A. Chesalov, Dmitry S. Kurdyumov, Arina V. Ukhina, Evgene A. Maksimovskiy, Arcady V. Ishchenko, Vitalii I. Sysoev, Alexander G. Bannov
Summary: In this study, room-temperature chemiresistive gas sensors for NO2 detection based on carbon nanofibers (CNFs) grown using chemical vapor deposition (CVD) were investigated. Various techniques such as transmission electron microscopy, low-temperature nitrogen adsorption, and X-ray diffraction were used to analyze the carbon nanomaterials. The synthesis of CNFs at different pressures was carried out using a COx-free decomposition method. The sensors based on CNFs synthesized at 1 bar showed promising responses to NO2 at different concentrations. The study also found that the increase in relative humidity enhanced the response of CNFs synthesized at elevated pressures.
Article
Biochemistry & Molecular Biology
Valeriy Golovakhin, Ekaterina Yu. Kim, Oksana N. Novgorodtseva, Evgene A. Maksimovskiy, Arina V. Ukhina, Arcady V. Ishchenko, Alexander G. Bannov
Summary: The aim of this study is to investigate the treatment of multi-walled carbon nanotubes (MWCNTs) with dichromic acid. Various analytical techniques were used to examine the texture characteristics, elemental composition, defectiveness, graphitization degree, and surface chemistry of MWCNTs after treatment with different concentrations of dichromic acid. It was found that the treated MWCNTs showed a decrease in average diameter, an increase in surface oxygen content, and the formation of Cr2O3. High angle annular dark field scanning transmission electron microscopy confirmed the intercalation of the chromium-containing compound between graphene layers. The highest specific capacitance of the treated MWCNTs was 141 F g(-1) (at 2 mV s(-1)) compared to 0.3 F g(-1) for the untreated sample.
Article
Nanoscience & Nanotechnology
Sunil Kumar, Veronika A. Dmitrieva, Gang Meng, Stanislav A. Evlashin, Ekaterina V. Sukhanova, Dmitry G. Kvashnin, Zakhar I. Popov, Alexander G. Bannov, Fedor S. Fedorov, Albert G. Nasibulin
Summary: We improved the sensitivity of NO2 analyte by adjusting the width ratio of adjacent graphene oxide (GO) and reduced graphene oxide (rGO) layers using GO laser reduction technique. The reduction of GO led to a chemiresistive response to NO2, and an optimum GO/rGO width ratio achieved a chemiresistive response of 18.1% towards 100 ppm of NO2 with a limit of detection of 230 ppb. The enhanced chemiresistive response of GO/rGO sensors to NO2 physisorption was attributed to increased sorption energy and improved charge transfer at the GO/rGO interface area compared to fully reduced GO.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Composites
Evgeniy N. Egorov, Evgeniia V. Salomatina, Vladislav R. Vassilyev, Alexander G. Bannov, Sergey I. Sandalov
Summary: The article investigates the impact of polynorbornene (PNB) in the composition of PNB with Norman 747 LV plasticizer (RC) on the curing characteristics and properties of vulcanizates based on different rubbers. The results show that an increase in the content of RC and PNB in the rubber compound leads to lower tensile strength, hardness, tear resistance, and storage modulus of vulcanizates. However, a specific composition with 24.0 phr (8.98 wt.%) of PNB in RC exhibits stable physico-mechanical properties, improved vibration absorption, and increased dielectric parameters, making it suitable for rail fasteners.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
I. Jennifer Gomez, Marina Russo, Orazio Angelo Arcidiacono, Esther M. Sanchez-Carnerero, Petr Klan, Lenka Zajickova
Summary: This study presents a strategy to connect highly efficient but poorly water-soluble BODIPY photosensitizers to the surface of nitrogen-doped graphene quantum dots (NGQDs) through controlled covalent functionalization. The NGQD-BODIPY PSs do not aggregate in aqueous solutions and generate reactive oxygen species (ROS), with high singlet-oxygen production quantum yields. In vitro experiments confirm that the PSs mainly accumulate in the cytoplasmic region of human cervical cancer cells, leading to a significant reduction in cell viability upon irradiation.
MATERIALS CHEMISTRY FRONTIERS
(2022)