Article
Materials Science, Coatings & Films
Ilker Torun, Nusret Celik, Mahmut Ruzi, M. Serdar Onses
Summary: The study proposes a universal solution to the limited mechanical durability of nanostructures by transferring the structure of paper to a PDMS film, resulting in a superhydrophobic surface with high levels of mechanical, chemical and thermal stability.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Polymer Science
Zhongjie Huang, Le Li, Taishan Yin, Keith A. Brown, Yuhuang Wang
Summary: Novel generations of photoactuated pens were introduced, and the impact of pen architecture on photoactuation efficiency and crosstalk was explored through simulations and experiments. The new design allowed for improved control over individual pens, reducing the influence of neighboring pens. The research results suggest novel applications of photoactive composite films in various fields.
Article
Engineering, Electrical & Electronic
Young Jung, Kyung Kuk Jung, Dong Hwan Kim, Dong Hwa Kwak, Seokyoung Ahn, Jeong Sam Han, Jong Soo Ko
Summary: This study presents a highly sensitive and flexible three-axis pressure sensor that can successfully measure three-axis pressure using a simple and large-scale fabrication method, demonstrating high sensitivity and reliability.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Multidisciplinary
S. Nootchanat, S. Boonmeewiriya, A. Parnsubsakul, N. Insin, S. Ekgasit, K. Wongravee
Summary: A simple, efficient, and economical method was presented to prepare superhydrophobic gold film embedded on PDMS sheets without surface pretreatment. Systematic investigations revealed that the generated gold film contains uniform spherical gold particles with complex hierarchical structures, which play a crucial role in the superhydrophobic property. The durability of the fabricated gold film was demonstrated by various tests, showing no disorientation in the main structures and their superhydrophobic properties.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Analytical
Qiushu Zhang, Bei Peng, Mengqi Chu, Pan Wen, Song Wang, Jintao Xu
Summary: Curved film microstructure arrays were fabricated through PDMS film buckling induced by mechanical stretching, resulting in microstructures with a spherical surface and good uniformity. These arrays can function as microlens arrays with a focal length of 1010 μm, and the geometry of the microstructures can be easily adjusted by controlling the applied prestrain. The microstructure formation mechanism was studied through theoretical analysis and numerical simulation, which showed good agreement with experimental results.
Article
Chemistry, Multidisciplinary
Yuan Liu, Xinyu Tan, Xinyi Li, Ting Xiao, Lihua Jiang, Shijin Nie, Jiale Song, Xiaobo Chen
Summary: In this study, a transparent superhydrophobic coating was successfully fabricated using an inexpensive and eco-friendly method. The coating demonstrated excellent light transmittance, as well as resistance to abrasion, acid/alkaline solutions, and UV irradiation. It shows great potential for outdoor applications.
Article
Physics, Applied
Jing Xu, Jingxuan Ma, Jiadi Lian, Yihong Liao, Luwen Wang, Linxi Dong, Hui Sun
Summary: In this study, a flexible pressure resistance sensor with a mesh convex platform microstructure has been prepared using PDMS as a substrate and graphene as a conductive functional layer. The addition of polyurethane to graphene and hydrophilic treatment of PDMS improves the stability of sensor sensitivity. The concentration of graphene and the thickness of PDMS have an impact on sensor sensitivity.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
Lixia Cheng, Renxin Wang, Xiaojian Hao, Guochang Liu
Summary: The study presents a flexible pressure sensor based on graphene and PDMS, which demonstrates high sensitivity within a wide pressure range. The sensor has a fast response time and excellent reproducibility at different pressures and temperatures, making it suitable for applications in electronic skin, flexible electronic devices, and other fields.
Article
Physics, Multidisciplinary
Malte Schlosser, Sascha Tichelmann, Dominik Schaeffner, Daniel Ohl de Mello, Moritz Hambach, Jan Schuetz, Gerhard Birkl
Summary: We have developed a novel platform for creating large-scale 3D multilayer configurations of neutral-atom qubits. Our method, based on a microlens-generated Talbot tweezer lattice, extends 2D tweezer arrays to the third dimension without additional costs. We demonstrate the trapping and imaging of rubidium atoms in different Talbot planes and the assembly of defect-free atom arrays in multiple layers. This approach allows for the realization of 3D atom arrays with scalable properties, enabling access to more than 10,000 qubit sites in our current implementation.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Yupeng He, Tianfeng Zhou, Yuewen Ning, Yao Hu, Qian Yu, Wenxiang Zhao, Xibin Wang, A. Senthil Kumar
Summary: In this study, a superimposed three-level-grooved surface is proposed to manipulate the diffraction of visible light and provide an array output. The effectiveness of the structure is verified through structure design, fabrication, and optical tests.
Article
Engineering, Electrical & Electronic
Gongdong Wang, Meng Wang, Mingyang Zheng, Songyang Yao, Blackie Ebo
Summary: In this research, a flexible strain sensor was developed using polydimethylsiloxane (PDMS) and graphene nano-platelets (GNPs) as the substrates and conductive layers. The sensor exhibited excellent resistance response and stability in different strain ranges, making it suitable for applications in electronic skin, wearable electronic devices, and component health monitoring.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Yongbiao Wan, Kun Chen, Feng Huang, Pidong Wang, Xiao Leng, Dong Li, Jianbin Kang, Zhiguang Qiu, Yao Yao
Summary: With the increasing demand for secure data transmission in modern society, true random numbers are essential for guaranteeing the security of encryption and decryption schemes. However, current true random number generators often lack compatibility with flexible platforms. In this study, a flexible and stretchable bionic true random number generator is developed, inspired by the uniqueness and randomness of biological architectures. The generator exhibits a fast generation speed, high extraction rate, and passes all randomness test suites. It also demonstrates robust mechanical reliability and thermal stability even under extreme conditions. This flexible true random number generator shows great promise for information security in emerging flexible networked electronics.
Article
Biochemical Research Methods
Dennis McDuffie, Charles G. Alver, Bhumi Suthar, Madeline Helm, David Oliver, R. Alan Burgess, David Barr, Emmanuel Thomas, Ashutosh Agarwal
Summary: Microphysiological Systems (MPSs) or organs-on-chips are microfluidic devices that mimic human physiology in vitro. Polydimethylsiloxane (PDMS) is commonly used for organs-on-chips due to its established fabrication methods and biocompatibility. However, non-specific binding of small molecules restricts the use of PDMS in drug screening applications.
Article
Polymer Science
Jisu Kim, U. Pramod Kumar, Sung-Jun Lee, Chang-Lae Kim, Jeong-Won Lee
Summary: Modifying surface wettability has been widely practiced in engineering for functional purposes. This study focuses on the fabrication and characterization of fluorine-free superhydrophobic coatings using varying ratios of PDMS and toluene. The results showed that the coating's roughness, wettability, and durability can be controlled by viscosity and surface structure. Furthermore, the superhydrophobic coatings exhibited great durability in saline solutions, but degradation was observed in acidic and alkaline solutions.
Article
Optics
Miao Xu, Senhao Li, Jing Li, Lyudi Zhang, Hongbo Lu
Summary: This work presents a straightforward, rapid, and low-cost technique for fabricating curved microlens arrays on polydimethylsiloxane (PDMS) substrates using the self-assembly technique. The proposed technique involves a reactive ion etching process followed by dip-coating and crosslinking to create a hydrophobic-hydrophilic pattern and realize the curved microlens array. The fabricated bionic compound eye structure showed a wide field of view and has potential applications in imaging sensors, medical diagnostics, machine vision systems, and photodetectors.
Article
Engineering, Electrical & Electronic
Bruno Galizia, Patrick Fiorenza, Corrado Bongiorno, Bela Pecz, Zsolt Fogarassy, Emanuela Schiliro, Filippo Giannazzo, Fabrizio Roccaforte, Raffaella Lo Nigro
Summary: This study demonstrates the growth of oriented AlN thin films on 4H-SiC substrates using PE-ALD technique, and investigates the impact of NH3 plasma pulsing on the microstructure and orientation degree of the AlN layers. The structural characterization reveals different polymorphic structures depending on the NH3 plasma pulsing time, and electrical nanoscopic characterization shows a correlation between the AlN crystalline phases and the insulating properties.
MICROELECTRONIC ENGINEERING
(2024)
Article
Engineering, Electrical & Electronic
Theo Levert, Alter Zakhtser, Julien Duval, Chloe Raguenez, Stephane Verdier, Delphine Le Cunff, Jean-Herve Tortai, Bernard Pelissier
Summary: In this study, the robustness of optical constants and optical band gap determination of three different materials is compared using a combination of spectroscopic ellipsometry and energy loss signal of X-ray photoelectron spectroscopy. The hybridization of these two techniques provides a new robust method for determining the band gap of the studied materials and other optical properties over a wide energy range.
MICROELECTRONIC ENGINEERING
(2024)
