Article
Nanoscience & Nanotechnology
Jinhao Zhang, Xin Wang, Zhiwei Yang, Jian Wang, Jiacheng Cao, Qian Chen, Shilong Yu, Jian Zhang, Tianwen Guo, Hai Li, Xiao Huang
Summary: In this study, egg-shell EGaIn/Ag/ZnO ternary composite particles were prepared as a wearable sensor capable of both pressure and proximity detection. The sensor showed excellent sensitivity to low pressures and could detect approaching objects up to 20 cm away. By combining the sensing curves in touchless and touching modes, the extracted parameters could be used to create fingerprints for different objects, demonstrating the potential of the sensor in the differentiation and identification of unknown objects for future robotics and artificial intelligence.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Adilson Luis Pereira Silva, Natanael de Sousa Sousa, Jaldyr de Jesus Gomes Varela Junior
Summary: This systematic review provides an overview of the use of pure B12N12 and B12N12-modified nanocages for detecting toxic gases through density functional theory (DFT) studies from 2011 to 2022. The review identifies the gases that can be selectively detected by pure B12N12 nanocage and metal-modified B12N12 nanocage. It also highlights the need for further research on the interference effects of other gases and structural modifications in the detection of toxic gases.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Marilyn Esclance DMello, Savithri Vishwanathan, Vasudeva Rao Bakuru, Ganapati Shanbhag, Suresh Babu Kalidindi
Summary: In this study, Co-ZnO-N/C nanomaterial derived from a metal-organic framework was demonstrated to be an effective rapid room-temperature H2 sensor. The unique nanostructure of the material enhanced signal transduction and promoted H2 diffusion, resulting in good gas sensing properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Environmental Sciences
Xiaohong Li, Shunling Li, Kai Gan, Xiongfei Bai, Shuli Li, Congkui Tang, Lei Li, Qing Qu
Summary: In this study, a facile method was designed to efficiently upcycle silver from waste X-ray films into highly dispersed biological Ag/AgO-AgCl nanoparticles using Bacillus thuringiensis-secreted extracellular polymeric substance. These nanoparticles were able to improve the catalytic kinetics of silver and exhibited excellent reduction efficiency for organic pollutants.
Article
Materials Science, Multidisciplinary
V. S. Kamble, R. K. Zemase, R. H. Gupta, B. D. Aghav, S. A. Shaikh, J. M. Pawara, S. K. Patil, S. T. Salunkhe
Summary: The application of Cu-doped ZnO nanomaterials in the gas sensing field was extensively studied. The structural, morphological, and spectral properties of the synthesized nanomaterials were examined. The gas sensing study revealed that the Cu-doped ZnO thin-film sensor showed a high response and selectivity towards NO2 gas under specific conditions.
Article
Environmental Sciences
Ioanna Efthimiou, Georgios Kalamaras, Katerina Papavasileiou, Natalia Anastasi-Papathanasi, Yiannis Georgiou, Stefanos Dailianis, Yiannis Deligiannakis, Dimitris Vlastos
Summary: The study investigated the cytotoxic and oxidative effects of custom-made nanoparticles on hemocytes of Mytilus galloprovincialis using hemolymph serum as exposure medium. Results showed that Ag NPs were more cytotoxic than ZnO-Ag NPs and/or ZnO NPs, with high levels of superoxide anion and malondialdehyde detected in cells treated with Ag NPs. Further studies are needed to understand the oxidative mode of action of NP metal ions in complex NP mixtures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Yao Yao, Gangli Liao, Wenbin Dong, Huina Cui, Zhen Zhao, Xinning Han
Summary: Ag@ZnO yolk-shell nanospheres were fabricated and used as chemical sensors, showing remarkable sensitivity and high response towards ethanol vapor. Compared to regular ZnO nanospheres, Ag@ZnO yolk-shell nanospheres based gas sensor exhibited improved performance.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Analytical
Xinyu Liu, Cuiping Jia, Xin Liu, Jiabing Luo, Yan Zhou, Wenle Li, Shutao Wang, Jun Zhang
Summary: Ag-doped mesoporous In2O3 synthesized through hydrothermal and calcination methods exhibited enhanced sensitivity and adsorption performance in gas sensing, specifically towards ethanol.
Article
Physics, Applied
Xiao-ling Lu, Xiao-bin Guo, Feng-chao Su, Zheng Su, Wen-hai Qiu, Yan-ping Jiang, Wen-hua Li, Zhen-hua Tang, Xin-gui Tang
Summary: Al-doped ZnO (AZO) flexible UV photodetectors were fabricated on polyethylene terephthalate substrates using the radio frequency magnetron sputtering technique. The single-layer AZO photodetector exhibited high photocurrent/dark current ratio and excellent photoresponse performance under UV illumination. The piezo-phototronic effect was found to have an important influence on the performance optimization and modulation of the flexible UV photodetectors.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Qiuping Zhang, Zemei Pang, Wenyu Hu, Jing Li, Yutong Liu, Yiliang Liu, Fei Yu, Chuanwu Zhang, Ming Xu
Summary: The chemiresistor-type sensors based on Ag-ZnO nanostructures exhibit excellent sensing properties to NO2 under visible light, but the performance degrades after long-term operation. This degradation is attributed to decreased crystal quality, increased oxygen vacancy defects, and oxidization of Ag-0 to Ag+ on ZnO surfaces. These factors lead to higher free charge carrier concentration in the dark and reduced photogenerated charge carrier concentration under light, resulting in decreased photoconductivity.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Hilda Dinah Kyomuhimbo, Immaculate Nyambura Michira, Emmanuel Iheanyichukwu Iwuoha, Usisipho Feleni
Summary: Metal-conducting polyaniline (PANI)-based nanocomposite materials have shown promising electrical, mechanical, and optical properties. In this study, different metal-PANI nanocomposites were prepared and formed nanocomposite-based electrode platforms. The results indicate that these nanocomposites exhibit improved electrical properties and could potentially be used in electrochemical applications.
Article
Chemistry, Analytical
Sonalika Agarwal, Sanjay Kumar, Himanshu Agrawal, Mohamad G. Moinuddin, Manoj Kumar, Satinder K. Sharma, Kamlendra Awasthi
Summary: The design of hierarchical zinc oxide (ZnO) microstructures modified with silver (Ag) nanoparticles has been proven effective in enhancing hydrogen gas sensing performance. The Ag/ZnO hollow microstructures showed superior sensitivity, fast response and recovery time, as well as good stability, even at low hydrogen gas concentrations. This enhancement in sensing performance is attributed to the chemical and electronic sensitization effect of Ag nanoparticles, leading to a more sensitive sensor with improved selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Polymer Science
Nour F. Attia, Asmaa Mohamed, Ahmed Hussein, Abdel-Gaffar M. El-Demerdash, Sherif H. Kandil
Summary: A green synthesis approach has been used to develop innovative coatings for textile fabrics that are flame retardant, antiviral, reinforced, and antibacterial. These coatings significantly enhance the properties of the textile fabrics, including flammability, toxic gases suppression, reinforcement, antibacterial, and antiviral properties.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yang Teng, Lu Zhou, Yi-Zhi Chen, Jun-Zhe Gan, Ye Xi, Hai-Lang Jia
Summary: In this study, a carbon material (OPC) with good graphitization characteristics and a few-layer structure obtained from discarded orange-peel was used as a support for nanoparticle catalysts. The Ru/OPC catalyst exhibited excellent catalytic performance in alkaline and acidic conditions, surpassing Ru/rGO and commercial Pt/C.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Electrical & Electronic
Yuant Tiandho, Ni Luh Wulan Septiani, Gilang Gumilar, Riri Jonuarti, Brian Suprijadi, Brian Yuliarto
Summary: In this study, an improvement strategy for the sensing performance of gold (Au) and silver (Ag) ellipsoid nanoparticles (NP-ELs) was proposed by controlling their size, aspect ratio (AR), and core-shell structure. The sensitivity and figure of merit (FOM) of the Ag-Au NP-ELs were calculated using a multiple oscillator model and discrete dipole approximation (DDA). The results showed that the aspect ratio parameter was more important than particle size in increasing sensitivity and FOM. The core-shell structure and parameters such as shell thickness, particle size, and aspect ratio also affected the absorption spectrum and sensing performance of the Ag-Au NP-ELs. The maximum sensitivity obtained was 597.7 nm/RIU with an FOM of 34 RIU-1.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Atomic, Molecular & Chemical
Nils Boysen, Anjana Devi
Summary: Electron ionization mass spectrometry (EI-MS) is commonly used for volatile and thermally stable organometallic complexes in chemical vapor deposition (CVD) processes. However, it has limitations for thermally unstable and labile organometallic complexes. Liquid injection field desorption/ionization mass spectrometry (LIFDI-MS) is exemplified as an important precursor characterization tool using three representative organometallic complexes based on yttrium, iridium, and silver. LIFDI-MS overcomes the limitations of EI-MS and is superior for the mass spectrometric analysis of sensitive and labile complexes. It provides valuable insights into the decomposition mechanisms and nuclearity of organometallic precursors for CVD applications.
EUROPEAN JOURNAL OF MASS SPECTROMETRY
(2023)
Article
Engineering, Electrical & Electronic
Marwa Ben Arbia, Ilkay Demir, Navpreet Kaur, Faouzi Saidi, Dario Zappa, Elisabetta Comini, Ismail Altuntas, Hassen Maaref
Summary: In this study, the structural dependences of InGaAs ternary compound were investigated using XRD, SEM-EDX, Raman, UV-vis, and PL techniques. The results showed successful growth of InGaAs as an active layer on InP substrate with good crystallinity and high indium concentration. The formation of an interfacial layer and the non-uniform distribution of indium were observed. The luminescence behavior of InGaAs was found to be influenced by the indium distribution, and a numerical simulation was developed to explain this anomaly.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Martin Wilken, Engin Ciftyuerek, Stefan Cwik, Lukas Mai, Bert Mallick, Detlef Rogalla, Klaus Schierbaum, Anjana Devi
Summary: The fabrication of nanostructured WO3 thin films for hydrogen gas sensing applications is achieved through a new chemical vapor deposition process. The surface characteristics and morphology of the as-grown WO3 layers are thoroughly analyzed, along with the stoichiometry, using various techniques. The WO3 layer shows remarkable sensitivity to hydrogen gas and exhibits a high and repeatable sensor response.
Article
Engineering, Electrical & Electronic
Andrea Tognazzi, Paolo Franceschini, Davide Rocco, Luca Carletti, Andrea Locatelli, Marco Gandolfi, Dario Zappa, Alfonso Carmelo Cino, Elisabetta Comini, Giuseppe Leo, Costantino De Angelis
Summary: We investigate the generation of second harmonic in dielectric nanocylinders, considering the incident field wavelength and geometrical dimensions. We find that, surprisingly, the second harmonic efficiency is not reduced by the increase of the imaginary part of the complex dielectric refractive index. The presence of higher order multipoles supported by the resonators at the fundamental wavelength can boost the generated second harmonic signal even in the dielectric absorption spectral region, achieving similar nonlinear efficiency as the lossless case.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Physics, Applied
Philipp A. Maass, Vitali Bedarev, Laura Chauvet, Marina Prenzel, Jean-Pierre Glauber, Anjana Devi, Marc Boeke, Achim von Keudell
Summary: Zirconia layers are commonly used as thermal barriers. In recent years, the deposition of these layers has been primarily examined using metalorganic precursor (MOCVD) methods. This study combines MOCVD with plasma activation, known as plasma-enhanced chemical vapor deposition (PECVD), to achieve lower growth temperatures and a more versatile coating design. PECVD transforms the precursor into a chemically active species, resulting in thin films with significantly higher adhesion compared to MOCVD. This improves crystallization at lower surface temperatures and maintains the crystalline structure of zirconia, although the electrical conductivity is affected. The thermal conductivity remains similar to pure zirconia.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Sonja Stefanovic, Negar Gheshlaghi, David Zanders, Ivan Kundrata, Baolin Zhao, Maissa K. S. Barr, Marcus Halik, Anjana Devi, Julien Bachmann
Summary: Area-selective atomic layer deposition (AS-ALD) is a bottom-up nanofabrication method that delivers single atoms from a molecular precursor. It offers advantages over lithography in terms of cost, resistance, and equipment prerequisites, but requires pre-patterned substrates and has limited selectivity and substrate choices. These challenges can be overcome with direct patterning using atomic-layer additive manufacturing (ALAM), which enables direct patterning instead of blanket coating. A functional thin-film transistor was created using ALAM-deposited ZnO and characterized.
Article
Chemistry, Multidisciplinary
Serge Benedoue, Mattia Benedet, Alberto Gasparotto, Nicolas Gauquelin, Andrey Orekhov, Johan Verbeeck, Roberta Seraglia, Gioele Pagot, Gian Andrea Rizzi, Vincenzo Balzano, Luca Gavioli, Vito Di Noto, Davide Barreca, Chiara Maccato
Summary: This study reports on the synthesis of gCN flakes on Ni foam substrates by electrophoretic deposition and their decoration with Co-based cocatalysts. The developed systems were tested as (photo)anodes for water splitting and photoelectrocatalysts for the degradation of a recalcitrant water pollutant. Results showed that gCN decoration with Co-based cocatalysts enhanced water splitting performances, but bare gCN was more efficient in degrading the pollutant due to a different reaction mechanism. The insights from this study may provide guidelines for active nanomaterials in environmental remediation and solar-to-chemical energy conversion.
Article
Nanoscience & Nanotechnology
Abderrahim Moumen, Rajashree Konar, Dario Zappa, Eti Teblum, Gilbert Daniel Nessim, Elisabetta Comini
Summary: In this study, two-dimensional heterojunction chemical sensors were successfully synthesized using ambient pressure chemical vapor deposition. The sensors showed enhanced response, stability, and selectivity. The liquid-phase exfoliation method was used to disperse bulk tungsten sulfide and tungsten selenide, and smaller tungsten selenide nanosheets were decorated on large flakes of tungsten sulfide through chemical vapor deposition. The resulting p-p heterojunction-based nanocomposite exhibited high stability, independent of humidity effects, and high selectivity towards NO2 gas.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Orhan Sisman, Dario Zappa, Valentin-Adrian Maraloiu, Elisabetta Comini
Summary: The study proposes an inverse design by depositing n-type ZnO shell layers on the surface of p-type CuO core-shell nanowires to understand their conductometric gas-sensing kinetics. The surface morphologies of bare and core-shell nanowires were investigated using FE-SEM. The ZnO shell layer was observed using EDX and HRTEM techniques. The deposition of ZnO shell layers switched the intrinsic p-type sensing behavior of CuO nanowires towards hydrogen to n-type.
Article
Physics, Condensed Matter
Mattia Benedet, Davide Barreca, Gian Andrea Rizzi, Chiara Maccato, Jan-Lucas Wree, Anjana Devi, Alberto Gasparotto
Summary: Nanocomposite systems based on Fe2O3-gCN possess great potential for environmental remediation and energy generation. In this study, Fe2O3-gCN nanomaterials were prepared using a two-step strategy and characterized using X-ray photoelectron spectroscopy. The results revealed a direct electronic interplay between Fe2O3 and gCN, providing useful guidelines for the design of photo(electro)catalysts with specific properties.
SURFACE SCIENCE SPECTRA
(2023)
Article
Green & Sustainable Science & Technology
Gayan W. C. Kumarage, Dario Zappa, Catalina G. G. Mihalcea, Valentin-Adrian Maraloiu, Mariana Stefan, Elisabetta Comini
Summary: This study presents conductometric sensors based on Co3O4 nanowires for hydrogen detection at ppb levels. The nanowires exhibit diameters between 6-50 nm and lengths of 1-5 & mu;m, primarily growing along the (311) direction of spinal Co3O4. Raman investigation reveals characteristic peaks corresponding to symmetric phonon modes of crystalline Co3O4. The sensors show abnormal n-type semiconducting behavior above 300 & DEG;C due to lattice oxygen's involvement in the hydrogen sensing mechanism. Operating at 450 & DEG;C in dry air, the sensor shows a higher response to 100 ppm H-2 compared to other gases and maintains a consistent conductance baseline even under high humidity for 25 days.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Mattia Benedet, Davide Barreca, Ettore Fois, Roberta Seraglia, Gloria Tabacchi, Marco Roverso, Gioele Pagot, Cristiano Invernizzi, Alberto Gasparotto, Alexandra A. Heidecker, Alexander Poehig, Emanuela Callone, Sandra Dire, Sara Bogialli, Vito Di Noto, Chiara Maccato
Summary: The coordination sphere engineering of three heteroleptic Ni(ii) beta-diketonate-diamine adducts was studied, and it was found that the chemico-physical characteristics of the compounds directly depend on the functional groups in the diketonate ligands. Preliminary thermal CVD experiments demonstrated the suitability of the precursors for the obtainment of NiO films with flat and homogeneous surfaces.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Gianluca D'Olimpio, Vardan Galstyan, Corneliu Ghica, Mykhailo Vorokhta, Marian Cosmin Istrate, Chia-Nung Kuo, Chin Shan Lue, Danil W. W. Boukhvalov, Elisabetta Comini, Antonio Politano
Summary: In this work, solution-processed In2Se3 nanosheets are shown to have exceptional selectivity and sensitivity to NO2 gas, making them a promising candidate for gas detection systems. The unique surface properties of In2Se3 nanosheets prevent oxidation and CO-poisoning, while enabling stable adsorption of NO2 molecules. This makes In2Se3 an ideal material for gas sensing applications in humid and harsh environments.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Mattia Benedet, Gian Andrea Rizzi, Oleg I. Lebedev, Vladimir Roddatis, Cinzia Sada, Jan-Lucas Wree, Anjana Devi, Chiara Maccato, Alberto Gasparotto, Davide Barreca
Summary: This research proposes a composite material of α-Fe2O3 and gCN as anodic material, with CoPi particles as modification, for efficient oxygen evolution in alkaline seawater photosplitting. The comprehensive characterization and performance testing prove that the composite material has beneficial effects and long-term stability, opening up new pathways for clean energy production.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Ruonan Tian, Zeyuan Gao, Ruifeng Lang, Na Li, Huilin Gu, Gang Chen, Hongtao Guan, Elisabetta Comini, Chengjun Dong
Summary: This study presented a novel synthesis method of iron-glycerate and explored the effects of different thermal treatments on its properties. It was found that the dual phases of alpha/gamma-Fe2O3 exhibited better sensing performance for acetone detection. Additionally, the sensor performance was further improved by doping with nickel and functionalizing with ruthenium nanoparticles.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2023)
