Article
Environmental Sciences
Admin Husic, James F. Fox, Evan Clare, Tyler Mahoney, Amirreza Zarnaghsh
Summary: Understanding the physics of nitrate contamination in surface and subsurface water is crucial for improving downstream water quality. This study utilized high-frequency data to develop a conceptual model for nitrate hysteresis in an agricultural karst spring in Kentucky, USA. By integrating hysteresis analysis into numerical model evaluation, the simulated nitrate prediction bounds and parameter uncertainty were significantly reduced. This study highlights the importance of integrating high-frequency sensor data into numerical models to improve process representation and reduce modeled uncertainty.
WATER RESOURCES RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
J. Magnus Rahm, Joakim Lofgren, Erik Fransson, Paul Erhart
Summary: Research on the thermodynamics of hydrogen in Pd-Au using alloy cluster expansions investigates the impact of different chemical orderings on material behavior, with a focus on hydrogen absorption/desorption isotherms. Results indicate the formation of a long-range ordered L1(2) phase and the occurrence of phase separation when full equilibrium is reached in the presence of hydrogen. These findings shed light on the stability of absorption/desorption isotherms in Pd-Au over time.
Article
Physics, Applied
T. Yajima, S. P. Pati
Summary: This study focuses on electrochemically doped protons inside TiO2 thin films to clarify the design principle for volatile memories. The research finds that the volatility of protons on the TiO2 surface can be controlled by the diffusion of protons inside a SiO2 cap layer. These findings provide a basic design principle for volatile memories.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Lars J. Bannenberg, Herman Schreuders, Hyunjeong Kim, Kouji Sakaki, Shigenobu Hayashi, Kazutaka Ikeda, Toshiya Otomo, Kohta Asano, Bernard Dam
Summary: The study reveals that the nanostructuring and nanoconfinement of metal hydrides have significant impacts on their structural response to hydrogen, leading to higher hydrogen-to-metal ratio, reduced tetragonality of the fct phase, and suppressed phase coexistence. These effects ensure a hysteresis free response of hafnium to hydrogen, demonstrating remarkable performance as a hydrogen-sensing material.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Abhishek Raj, Manish Kumar, Arvind Kumar, Amel Laref, Kedar Singh, Subhash Sharma, Avneesh Anshul
Summary: Titanium dioxide is widely used in perovskite solar cells, but its future applicability is hindered by high annealing temperature and the hysteresis effect. Recent strategies such as doping engineering have significantly improved the device performance and stability.
Article
Chemistry, Analytical
Beyza Bozali, Sepideh Ghodrat, Linda Plaude, Joris J. F. van Dam, Kaspar M. B. Jansen
Summary: This study investigates the electromechanical performance of weft-knitted strain sensors and explores the effects of different variables on sensor performance. By positioning the conductive yarns at the inside of the sensing area, sensors with low hysteresis values can be obtained. The results show that by varying the knitting density, linear sensors with a working range up to 40% strain, hysteresis values as low as 0.03, and different GF values can be achieved.
Article
Materials Science, Multidisciplinary
Yuanlai Fang, Zhongxiang Bai, Li Yang, Jingjiang Wei, Yi Wang, Shan Wang, Jiaxi Cui
Summary: In this study, low-hysteretic and adhesive organohydrogel-based strain sensors were prepared to improve the reliability and sensing performance. The mechanical hysteresis of the sensors was regulated by adjusting the concentration of aniline. The PAA layer ensured conformal contact with the skin, ensuring the integrity of the signals.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Dong Hyun Kim, Dong Wook Lee, Jin Young Oh, Ju Hwan Lee, Jonghoon Won, Jong In Jang, Hae-Chang Jeong, Dae-Shik Seo
Summary: In this study, nanoimprinting lithography was performed on solution-processed SnO film to obtain nanostructures. These nanostructures acted as guides for the alignment of liquid crystal molecules, minimizing elastic distortion energies through geometric restrictions, and aligning the LC molecules in the direction of the nanostructures. The high thermal endurance and low power consumption of the SnO film were demonstrated, making it a promising candidate for LC applications. Additionally, the combination of nanopatterning lithography and solution-processed inorganic materials showed the potential for expanding the features of nanostructure-mounted applications.
Article
Chemistry, Analytical
Tonghao Liu, Rongning Liang, Wei Qin
Summary: Researchers have developed a polymeric membrane ion-selective electrode with excellent anti-fouling and self-cleaning properties through surface covalent modification of an anatase TiO2 coating. The reactive oxygen species produced by photocatalytic TiO2 can kill microorganisms and degrade organic foulants, while a superhydrophilic film prevents foulant adsorption, inhibiting biofouling and organic fouling. Water droplet flow enables complete self-cleaning of residual foulants. This approach shows promise for improving the fouling resistance of other electrochemical or optical membrane sensors and constructing contamination-free sensors.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Suk Yeop Chun, Young Geun Song, Ji Eun Kim, Jae Uk Kwon, Keunho Soh, Ju Young Kwon, Chong-Yun Kang, Jung Ho Yoon
Summary: Technologies combining gas sensors and neuromorphic computing have great potential, but conventional gas sensors lack necessary functions for neuromorphic olfactory systems. This study proposes a chemi-memristive gas sensor based on oxygen vacancy dynamics, which enhances redox reactions and induces rapid current changes. The sensor achieves fast responses, short recovery times, and hysteresis. The sensor's advantageous functionality allows for the experimental demonstration of device-level olfactory systems and the conversion of gas stimuli into synaptic weights.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Zhuoping He, Qianqian Yang, Guoqiang Xi, Jie Tu, Jianjun Tian, Linxing Zhang
Summary: The first measurement of ferroelectric hysteresis loop in pure anatase-phase titanium dioxide was reported, demonstrating ferroelectric-like behavior in a-TiO2 epitaxial thin films prepared by chemical solution deposition method. The quality of epitaxial films was confirmed by synchrotron based X-ray diffraction and reciprocal space mapping. The results showed that the polarization of a-TiO2 film with a thickness of 14.5 nm could reach approximately 0.42 mu C/cm2. Atomic force microscopy (PFM) revealed ferroelectric-like behavior in the 7.5 nm a-TiO2 film, with the PFM polarization switch maintained for over 100 minutes. The origin of this behavior is attributed to strain and vacancy-induced distortion, while the electrochemical effect has a significant influence on the intrinsic ferroelectric performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Kuo Zhan, Zhaolong Wang, Yabin Zhu, Jun Yan, Yunlin Chen
Summary: This paper proposes a nano-porous UIO-66-NH(2)/TiO(2) Bragg reflector sensor for highly sensitive, selective, and repetitive real-time detection of low concentration HCl gas. The sensor demonstrates a high sensitivity and fast optical response and recovery time, along with excellent selectivity among different gases. The UIO-66-NH(2)/TiO(2) sensor shows exceptional reversibility and reliability, indicating its potential for detecting low concentration HCl gas.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Na Zhao, Yudong Luo, Yantao Shen
Summary: This article presents a low-cost 3-D microforce sensor based on hybrid carbon/polymer-based soft piezoresistive (HCP) films, which has high sensitivity, robustness, low thermal drift, and hysteresis. The article employs data-based calibration methods to overcome the challenge of accurate modeling for flexible material-based sensors. The developed sensor is experimentally proven to be highly sensitive, durable, low cost, self-decoupling, and impact-resistant for potential miniature biomedical applications.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Pankaj Chetry, Elizabeth George, Pradeep Sarin, Kantimay Das Gupta, K. Suresh, J. Navas, C. David, R. Govindaraj
Summary: We describe the fabrication and characterization of a novel ultraviolet (UV) and ionizing radiation detector using a polycrystalline TiO2 wide-bandgap semiconductor as the active material. The detector geometry is a polycrystalline TiO2 thin film with planar electrode contacts for signal pickup. Several prototypes were fabricated using two single-step techniques. We present the dc characterization of these devices and the signal response to the UV light and low-energy proton beam irradiation. The detector prototypes show excellent dc characteristics and fast ac signal response at bias voltage as low as 50 V.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Anky Fitrian Wibowo, Joo Won Han, Jung Ha Kim, Ajeng Prameswati, Siti Aisyah Nurmaulia Entifar, Jihyun Park, Jonghee Lee, Soyeon Kim, Dong Chan Lim, Youngho Eom, Myoung-Woon Moon, Min-Seok Kim, Yong Hyun Kim
Summary: In this study, a conductive, stretchable, hydro-biodegradable, and highly robust cellulose/PEDOT:PSS hybrid film is fabricated. Through the synergetic interplay of a conductivity enhancer, nonionic fluorosurfactant, and surface modifier, the mechanical and electrical properties of the stretchable hybrid film are greatly improved. The stretchable cellulose/PEDOT:PSS hybrid film achieves a limited resistance change of only 1.21-fold after 100 stretch-release cycles (30% strain) with exceptionally low hysteresis, demonstrating its great potential as a stretchable electrode for stretchable electronics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
