Article
Materials Science, Multidisciplinary
Monika Tomczyk, Pawel Osewski, Marie-Helene Berger, Ryszard Diduszko, Iwona Jozwik, Giorgio Adamo, Dorota A. Pawlak
Summary: A novel manufacturing method of ZnO lamellae embedded in ZnWO4 matrix was demonstrated through directional solidification from the melt. Phase separation between ZnO and ZnWO4 was revealed through electron microscopy studies, and high quality and crystallinity of ZnO lamellae were confirmed by cathodoluminescence. Utilization of directional solidification of eutectics may enable cost-efficient manufacturing of bulk nanostructured ZnO composites for optical devices.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Kaizhen Han, Subhranu Samanta, Shengqiang Xu, Ying Wu, Xiao Gong
Summary: The study found that by reducing the equivalent oxide thickness, a temperature-independent mu(eff) can be achieved in the high field or high carrier concentration regime, while a strong temperature dependency is observed in the low field or low carrier concentration regime. Additionally, the relationship between EOT scaling and the gate bias voltage at which E-F equals to E-M was studied, revealing that α-IGZO TFTs can achieve high performance in low-power applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Nanoscience & Nanotechnology
Pengfei Wang, Huan Yang, Jiye Li, Xiaohui Zhang, Lei Wang, Juncheng Xiao, Bin Zhao, Shengdong Zhang, Lei Lu
Summary: The large-area low-temperature processing capability and versatile characteristics of amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) are highly expected to promote the developments of next-generation displays and electronics. However, the abundance of defects in AOSs limits the performance and integration scale. To overcome this challenge, a bilayer AOS channel with an abrupt metal-oxide heterojunction is proposed to enhance the performance and reliability of AOS TFTs.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Monica Terracciano, Simas Rackauskas, Andrea Patrizia Falanga, Sara Martino, Giovanna Chianese, Francesca Greco, Gennaro Piccialli, Guido Viscardi, Luca De Stefano, Giorgia Oliviero, Nicola Borbone, Ilaria Rea
Summary: The physicochemical properties of three different ZnO tetrapodal nanostructures (ZnO-Ts) synthesized by a combustion process were studied and evaluated for label-free biosensing purposes. The chemical reactivity of ZnO-Ts was explored by quantifying the available functional hydroxyl groups (-OH) on the transducer surface necessary for biosensor development. The best ZnO-T sample was chemically modified and bioconjugated with biotin as a model bioprobe, confirming their suitability for biosensing applications through streptavidin target detection experiments.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Coatings & Films
Asta Tamuleviciene, Rasa Mardosaite, Mindaugas Ilickas, Brigita Abakeviciene, Tomas Tamulevicius, Saruunas Meskinis, Simas Rackauskas
Summary: This study investigates the wettability of ZnO-T coatings in relation to surface morphology and DLC:SiOx film parameters. ZnO-Ts with different leg lengths show varying degrees of wettability, which can be further changed by keeping the samples in the dark at room temperature. DLC:SiOx films significantly enhance the hydrophobicity of ZnO-T coatings, and their thickness affects the surface roughness and hydrophobicity. Additionally, DLC:SiOx films provide protection against abrasion and light-induced effects. The results suggest that the largest ZnO-T fraction with a 40 nm thickness of DLC:SiOx film provides the best hydrophobicity, while the smallest ZnO-T fraction with a 120 nm thickness of DLC:SiOx film offers better mechanical durability. The detailed analysis conducted in this study can be beneficial for the application of other nanostructures with protective coatings in wettability control.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Wenhui Wang, Ke Li, Jun Lan, Mei Shen, Zhongrui Wang, Xuewei Feng, Hongyu Yu, Kai Chen, Jiamin Li, Feichi Zhou, Longyang Lin, Panpan Zhang, Yida Li
Summary: The development of high-performance oxide-based transistors is crucial for the integration of monolithic 3-D circuits into CMOS backend. In this study, an optimized ALD deposited ZnO thin-film transistor achieved a record field-effect and intrinsic mobility. The successful integration of ZnO TFTs with HfO2 RRAM demonstrated RRAM switching capabilities.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Han-Yin Liu, Pei-Huang Hsu, Wei-Ting Chen, Zhen-Yuan Huang
Summary: This study investigates heterojunction thin-film transistors (HTFTs) with MgXZn1-XO/zinc oxide (ZnO) heterojunctions deposited using mist chemical vapor deposition (mist-CVD). Different Mg/Zn ratios and MgXZn1-XO thickness are used to form HTFTs with varying electrical characteristics. The study finds that the Mg0.3Zn0.7O (30 nm)/ZnO HTFT exhibits the optimum electrical performance and stability.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Yan-Kui Liang, Jing-Wei Lin, Li-Chi Peng, Yi Miao Hua, Tsung-Te Chou, Chi-Chung Kei, Chun-Chieh Lu, Huai-Ying Huang, Sai Hooi Yeong, Yu-Ming Lin, Po-Tsun Liu, Edward-Yi Chang, Chun-Hsiung Lin
Summary: In this article, enhancement-mode thin-film transistors (TFTs) with ultrathin (approximately 3 nm) amorphous indium-zinc oxide (a-IZO) channel derived from atomic layer deposition (ALD) were demonstrated. The ALD-deposited IZO channel TFT showed improved device characteristics compared to thicker IZO channels. It exhibited high field-effect channel mobility, low subthreshold gate swing, high Ion/Ioff current ratio, and stable threshold voltages after positive and negative bias stress tests.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Engineering, Electrical & Electronic
Abdullah G. Alharbi, Nawaz Shafi
Summary: In this study, a circular zinc oxide thin film transistor (TFT) was reported for the first time and its applicability as an ultraviolet photodetector was experimentally demonstrated. The fabricated TFT showed high sensitivity towards UV wavelengths and significant increase in current under UV light illumination.
MICROELECTRONICS JOURNAL
(2023)
Article
Materials Science, Ceramics
M. Arellano-Cortaza, E. Ramirez-Morales, S. J. Castillo, L. Lartundo-Rojas, I. Zamudio-Torres, E. M. Lopez Alejandro, L. Rojas-Blanco
Summary: ZnSe/ZnO heterostructures were synthesized using the microwave-assisted hydrothermal method with zinc acetate and zinc nitrate as the source of Zn2+ ions. The incorporation of ZnSe into the ZnO matrix resulted in changes in the size of ZnO crystallites and lattice parameters. Optical and texture analyses showed that ZnSe particles caused a decrease in gap energy and a significant increase in the specific surface area of ZnSe/ZnO heterostructures. ZnSe/ZnO heterostructures synthesized with zinc acetate exhibited better photocatalytic performance in visible light compared to pure ZnO.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Fuming Wu, Yixuan Liu, Jun Zhang, Xiangxiang Li, Hui Yang, Wenping Hu
Summary: In this study, high-mobility stretchable semiconducting blend films were prepared by blending a polymer semiconductor with an elastomer. The resulting blend films have low crystallinity and high aggregation degree, resulting in high stretchability and high mobility. The fully stretchable organic transistors exhibit high hole maximum mobilities at various strains and show high mechanical robustness during repeated stretching-releasing cycles.
SCIENCE CHINA-MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Farid Orudzhev, Arsen Muslimov, Daud Selimov, Rashid R. Gulakhmedov, Alexander Lavrikov, Vladimir Kanevsky, Rashid Gasimov, Valeriya Krasnova, Dinara Sobola
Summary: This paper reports on the high photocatalytic activity of ZnO tetrapods (ZnO-Ts) under visible/solar light and hydrodynamic water flow. It was demonstrated that surface oxygen defects play a crucial role in the photocatalytic activity of ZnO-Ts. The ability to control the surface wettability and surface defect concentration of ZnO-Ts was also shown. Additionally, the similar photocatalytic activity of ZnO-Ts under direct and simulated sunlight offers great potential for solar photocatalysis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Crystallography
Vladimir Ciobanu, Veaceslav V. Ursaki, Sebastian Lehmann, Tudor Braniste, Simion Raevschi, Victor V. Zalamai, Eduard V. Monaico, Pascal Colpo, Kornelius Nielsch, Ion M. Tiginyanu
Summary: New aeromaterials are proposed in this paper, which are based on titania thin films deposited using atomic layer deposition (ALD) on a sacrificial network of ZnO microtetrapods. The morphology, composition, and crystal structure of the aeromaterials are investigated depending on the temperature of annealing and the sequence of the technological steps. Photoluminescence analysis suggests that these aeromaterials have potential for photocatalytic applications.
Article
Materials Science, Multidisciplinary
Sori Jeon, Kwang-Heum Lee, Seung-Hee Lee, Seong-In Cho, Chi-Sun Hwang, Jong Beom Ko, Sang-Hee Ko Park
Summary: Vertical thin-film transistors (TFTs) with low contact resistance are necessary for high-resolution displays in virtual reality and augmented reality applications. The choice of electrode materials significantly affects the electrical performance of vertical TFTs.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Sori Jeon, Kwang-Heum Lee, Seung-Hee Lee, Seong-In Cho, Chi-Sun Hwang, Jong Beom Ko, Sang-Hee Ko Park
Summary: To achieve high-resolution displays for virtual reality and augmented reality applications, vertical thin-film transistors (TFTs) with low contact resistance are necessary. This study analyzed the contact properties and electrical performance of TFTs with different electrode materials, and found that Mo/Al/Mo electrodes exhibited better contact properties and electrical performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Ebru Yabas, Emre Bicer, Mete Batuhan Durukan, Deniz Keskin, Husnu Emrah Unalan
Summary: Double-decker phthalocyanines were synthesized and non-covalent double-decker phthalocyanine-reduced graphene oxide composites were prepared. The fabricated composites showed promising electrochemical performance.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ana F. Suzana, Sizhan Liu, Jiecheng Diao, Longlong Wu, Tadesse A. Assefa, Milinda Abeykoon, Ross Harder, Wonsuk Cha, Emil S. Bozin, Ian K. Robinson
Summary: When synthesized under certain conditions, barium titanate (BTO) nanoparticles show a non-thermodynamic cubic structure and have an enhanced dielectric constant. These nanoparticles are widely used in thin-layer capacitors. Characterization methods, including X-ray refinement and the Williamson-Hall approach, reveal the presence of notable strain associated with the cubic phase. However, X-ray pair distribution function measurements indicate a lower symmetry local structure.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Physical
Ralf F. F. Ziesche, Thomas M. M. Heenan, Pooja Kumari, Jarrod Williams, Weiqun Li, Matthew E. E. Curd, Timothy L. L. Burnett, Ian Robinson, Dan J. L. Brett, Matthias J. J. Ehrhardt, Paul D. D. Quinn, Layla B. B. Mehdi, Philip J. J. Withers, Melanie M. M. Britton, Nigel D. D. Browning, Paul R. R. Shearing
Summary: The demand for low carbon energy storage has emphasized the importance of imaging techniques in characterizing electrode microstructures, determining key parameters for battery manufacture, operation, degradation, and failure in both next generation lithium batteries and other novel battery systems. This review summarizes recent progress and highlights in magnetic resonance, neutron, X-ray, focused ion beam, scanning and transmission electron microscopy. Two major trends are identified: the use of multi-modal microscopy in a correlative fashion, providing contrast modes across length and time scales, and the application of machine learning to guide data collection and analysis, recognizing the role of these tools in evaluating large data streams from increasingly sophisticated imaging experiments.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Onur Demircioglu, Melih Ogeday Cicek, Doga Doganay, Gunay Gazaloglu, Cuneyt Baykal, Simge Cinar, Husnu Emrah Unalan
Summary: This study modifies a commercial buoy and proposes a pendulum-like TENG for ocean wave energy harvesting, utilizing triboelectric materials polyurethane foam and poly (dimethyl siloxane) (PDMS) to efficiently convert wasted surface and underwater waves into electricity, powering marine-based devices without greenhouse emissions.
Article
Chemistry, Physical
Longlong Wu, Seongmin Bak, Youngho Shin, Yong S. Chu, Shinjae Yoo, Ian K. Robinson, Xiaojing Huang
Summary: Multimodal hard X-ray scanning probe microscopy combines ptychography with X-ray fluorescence (XRF) microscopy to study functional materials, providing both structural and chemical information. A machine learning model is developed to enhance spatial resolution by decoupling the effect of X-ray probe from the XRF signal, showing superior performance compared to traditional scanning XRF methods. The proposed method can be widely applied in functional materials and biological imaging with XRF microscopy and related applications.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Melek Hazal Baskoy, Oyku Cetin, Serkan Koylan, Yaqoob Khan, Gurdal Tuncel, Tuba Hande Erguder, Husnu Emrah Unalan
Summary: Air pollution is a growing problem that poses a global threat. Particulate matter, especially PM2.5, is a major concern for air quality. This study introduces a two-dimensional titanium carbide MXene nanosheets-decorated nylon mesh as a low-cost and highly efficient PM2.5 filter. The filters, utilizing electrostatic force, achieved a removal efficiency of 90.05% with an ionizer and an applied voltage of 10V, comparable to a commercial high-efficiency particulate air (HEPA) filter. These filters have low energy consumption, low pressure drop, and cost-effectiveness, making them potential competitors to conventional PM filter systems.
Article
Nanoscience & Nanotechnology
Yigithan Tufan, Hayriye Oztatli, Doga Doganay, Arda Buyuksungur, Melih Ogeday Cicek, Ipek Tugce Dos, Cagla Berberoglu, Husnu Emrah Unalan, Bora Garipcan, Batur Ercan
Summary: In this proof-of-concept study, researchers combined cardiomyogenic differentiation of induced pluripotent stem cells (iPSCs) with energy harvesting from simulated cardiac motion using silk fibroin-based porous scaffolds as triboelectric nanogenerator (TENG) electrodes. The study showed that the scaffolds with specific pore architecture could upregulate the expression of cardiac-specific gene markers from iPSCs. By incorporating carbon nanofibers, the scaffolds also exhibited enhanced mechanical properties and electrical conductivity, resulting in efficient energy harvesting under simulated cardiac motion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Mete Batuhan Durukan, Deniz Keskin, Yigithan Tufan, Orcun Dincer, Melih Ogeday Cicek, Bayram Yildiz, Simge Cinar Ayguen, Batur Ercan, Husnu Emrah Unalan
Summary: With the rapid development of technology, the use of small and miniaturized electronics has increased significantly, but the prevalent power sources based on potentially toxic materials pose environmental problems. Edible and ingestible electronic devices have emerged as a sustainable solution. Researchers have developed edible gel electrolytes using hydroxyethyl cellulose and commercial soy sauce, which demonstrate superior ionic conductivity and anti-drying properties, enabling the fabrication of edible supercapacitor devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hyojung Kim, Seunghyeon Nam, Mete B. Durukan, Husnu E. Unalan, Hyunjoo J. Lee
Summary: This article introduces a hybrid film composed of a layer of piezoelectric nanowire and a layer of microgel that can continuously monitor glucose, does not rely on enzymes, and has self-charging capabilities. By characterizing the self-charging/discharging properties, the operation and sensing mechanism of the film are proposed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Mustafa Caner Gorur, Doga Doganay, Mete Batuhan Durukan, Melih Ogeday Cicek, Yunus Eren Kalay, Cem Kincal, Nuri Solak, Husnu Emrah Unalan
Summary: Thermal management of electronic devices is crucial for enhancing performance, efficiency, and lifespan. The use of h-BNNS/PLA nanocomposites has shown great potential in improving thermal conductivity and heat dissipation.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Physical
Doga Doganay, Onur Demircioglu, Murathan Cugunlular, Melih Ogeday Cicek, Onuralp Cakir, Huseyin Utkucan Kayaci, Simge Cinar Aygun, Husnu Emrah Unalan
Summary: Wearable electronics based on textiles have gained significant attention due to their flexibility, stretchability, and breathability. This study employed a wet spinning method to produce stable and stretchable fiber/fabric TENGs, demonstrating their weaving potential and wireless control capabilities.
Article
Materials Science, Multidisciplinary
Melih Ogeday Cicek, Mete Batuhan Durukan, Bayram Yildiz, Deniz Keskin, Doga Doganay, Simge cinar Aygun, Murat Perit Cakir, Husnu Emrah Unalan
Summary: A cellulose-based supramolecular bio-polymer gel (SBPG) with high ionic conductivity and exceptional stiffness is reported. The gel is used to fabricate a prototype smart glove with ultra-high sensitivity iontronic pressure sensors and a tactile feedback algorithm for object recognition.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Yasemin Pepe, Serife Akkoyun, Nurcan Asci, Eda Cevik, Yusuf Tutel, Ahmet Karatay, Husnu Emrah Unalan, Ayhan Elmali
Summary: The optical limiting behavior triggered by nonlinear absorption can be enhanced by incorporating MnO2 nanoparticles into polymer nanofibers. The behavior becomes more pronounced with increasing concentration of MnO2 nanofiller, but weakens at higher input intensity due to the filling of localized defect states by one photon absorption. The composite nanofibers with a higher concentration of MnO2 nanofiller exhibit stronger nonlinear absorption behavior and can be potentially used in optoelectronic applications operating in a wide spectral range.
Article
Chemistry, Analytical
Seunghyeon Nam, Hyojung Kim, Sang-Mok Lee, Mete Batuhan Durukan, Husnu Emrah Unalan, Hyunjoo J. Lee
Summary: In this study, pNIPAm microgels were used as a glucose-responsive layer to measure changes in glucose concentration based on spectral shifts. The results showed that this sensor could be used to detect sweat glucose concentration in diabetic patients, and the response time could be improved by introducing grid-shaped slits.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Yusuf Tutel, Mete Batuhan Durukan, Serife O. Hacioglu, Umran Ceren Baskose, Levent Toppare, Husnu Emrah Unalan
Summary: This study demonstrates the use of ultrasonic spray deposition method to prepare bare MoO3 and cobalt-doped MoO3 thin films for electrochromic (EC) applications. Cobalt doping significantly improves the cyclic stability of the films. Moreover, MoO3:Co films show excellent performance in dual-band electrochromic devices with high capacitance retention and transmittance change.
APPLIED MATERIALS TODAY
(2023)
