Article
Nanoscience & Nanotechnology
Debarun Sengupta, Liqiang Lu, Diego Ribas Gomes, Bayu Jayawardhana, Yutao Pei, Ajay Giri Prakash Kottapalli
Summary: Flexible piezocapacitive sensors utilizing nanomaterial-polymer composite-based nanofibrous membranes offer an attractive alternative to traditional wearable sensors due to their low power consumption, fast response, low hysteresis, and insensitivity to temperature change. In this study, graphene-dispersed PVAc nanofibrous membrane-based piezocapacitive sensors were fabricated using a simple method for IoT-enabled wearables and human physiological function monitoring. Various tests were conducted to understand the effect of graphene addition on nanofiber morphology, dielectric response, and pressure sensing performance. The robustness and reliability of the sensor were demonstrated through accelerated lifetime assessment experiments. Tests involving human physiological parameter monitoring further highlighted the applicability of the sensor in IoT-enabled healthcare, soft robotics, and prosthetic devices. The easy degradability of the sensing elements was also demonstrated, emphasizing their suitability for transient electronics applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Junbo Zhu, Xian Huang, Weixing Song
Summary: Laser-induced graphene (LIG) is a rapidly produced, environmentally friendly material with a three-dimensional porous structure, widely utilized in sensors. However, there is still a lack of systematic review on its synthesis, sensing mechanisms, and applications.
Article
Chemistry, Multidisciplinary
Sonia Freddi, Miriam C. Rodriguez Gonzalez, Pilar Carro, Luigi Sangaletti, Steven De Feyter
Summary: In this study, functionalized graphene gas sensors for ammonia detection were developed. The sensing capability of the covalently modified graphene layers was proven superior, and the sensor's response to ammonia was defect-driven, as revealed by theoretical calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Jianqiang Guo, Boyang Mao, Jiongli Li, Xudong Wang, Xinzheng Yang
Summary: The core issue in the chemical reduction of graphene oxide is the reduction of hydroxyl groups. Two fundamental reaction mechanisms, E1 and E1cB, are proposed and investigated through Density Functional Theory calculations, showing favorable kinetics and thermodynamics. A novel reducing agent, NaSH, is developed and proven to be efficient in reducing GO at room temperature, confirming the feasibility of the proposed reaction pathways.
Article
Chemistry, Multidisciplinary
Tatsuro Saito, Miyuki Tabata, Atsunobu Isobayashi, Hiroko Miki, Yuji Miyahara, Yoshiaki Sugizaki
Summary: The research developed a method of chemical modification using plasma treatment of amino groups on graphene for biosensor applications, enabling specific and precise detection of target DNA without affecting carrier mobility. Plasma-assisted modification of amino groups on graphene surface was optimized for immobilization of DNA probes and successful hybridization with target DNA demonstrated.
Review
Nanoscience & Nanotechnology
Federico Maria Vivaldi, Alexander Dallinger, Andrea Bonini, Noemi Poma, Lorenzo Sembranti, Denise Biagini, Pietro Salvo, Francesco Greco, Fabio Di Francesco
Summary: Graphene, despite being relatively new, has shown great potential in various fields such as chemical and biosensors. Laser-induced graphene (LIG), as a 3D porous material produced by direct laser scribing of carbonaceous precursors, has a high surface-to-volume ratio making it ideal for sensors relying on surface and interface phenomena.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Yuri Sakamoto, Takashi Ikuta, Kenzo Maehashi
Summary: This study proposes a method to electrically detect chemical reactions on graphene surfaces, achieving highly sensitive detection. Through the thiol-ene reaction, bond changes were successfully detected on graphene surfaces.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Zhipeng Liang, Huanxia Zhang, Runzhou Huang, Tao Xu, Hao Fong
Summary: An innovative method was developed to produce 3D elastic and conductive nanofibrous sponges with high sensitivity and great mechanical properties for a wearable tactile pressure sensor, by assembling shortened PAN/PI electrospun nanofibers and rGO nanosheets. The sponges exhibited good mechanical strength and high porosity, with the amount of rGO influencing the sensitivity and current change ratio during compression, making them ideal for wearable sensors.
Article
Materials Science, Coatings & Films
Gustavo Alexandre Viana, Douglas Soares da Silva, Richard Landers, Jilian Nei de Freitas, Marcelo Gradella Villalva, Francisco das Chagas Marques
Summary: This study systematically investigated the species effusion processes of thermally reduced multilayered GO using thermal desorption mass spectroscopy. The results revealed that at around 230 degrees C, collective desorption of H2O, CO2, CO, and H occurred, while at temperatures higher than 400 degrees C, only uncoupled CO2 and CO desorptions were detected. The annealing temperature range of ambient to 1000 degrees C led to a significant variation in conductivity, indicating an insulating-conductive transition.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Zineb Benzait, Levent Trabzon
Summary: This study investigates the impact of different graphite flake sources on the size, structure, and properties of graphene oxide (GO) and reduced graphene oxide (rGO). The results show that the graphite flake size not only affects the expansion volume and final properties of GO, but also influences the presence of organosulfate impurities, defects, size distribution, and the oxidation reaction itself.
Review
Nanoscience & Nanotechnology
Zhichao Zhang, Yeageun Lee, Md Farhadul Haque, Juyoung Leem, Ezekiel Y. Hsieh, SungWoo Nam
Summary: Graphene plasmonics has experienced rapid growth in the past decade and has found applications in various fields. Compared to traditional materials, graphene allows for highly confined and long-lived plasmons, working in an extended wavelength range that overlaps with organic and biomolecular fingerprints. This review discusses the intrinsic properties of graphene plasmons, strategies for tuning and improving their performance, and surveys applications in biosensors, chemical sensors, and other fields.
Article
Chemistry, Multidisciplinary
Benji Fenech-Salerno, Martin Holicky, Chengning Yao, Anthony E. G. Cass, Felice Torrisi
Summary: We present a new and versatile sensing platform using electrolyte-gated graphene field-effect transistors, allowing for easy, low-cost, and scalable production of chemical sensor test strips. This Lab-on-PCB platform is made possible by utilizing a sprayable graphene ink with low-boiling point and low-surface-tension, coated on a substrate manufactured using a commercial printed circuit board process. By sensing pH and Na+ concentrations in aqueous solution, our platform achieves a sensitivity of 143 +/- 4 mu A per pH and 131 +/- 5 mu A per log(10) Na(+), which is comparable to state-of-the-art graphene chemical sensing performance.
Article
Engineering, Electrical & Electronic
Zirui Yan, Yaofang Zhang, Yingwen Pan, Wei Sun, Xiang Li, Jiale Huo, Yan Shen, Xiaoying Kang, Weimin Kang
Summary: This study investigated the preparation of hollow tin dioxide (SnO2) nanofibers using electrostatic spinning technique and calcination process. The morphology was observed using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), and the chemical state of the elements was characterized using X-ray photoelectron spectroscopy (XPS). Gas-sensitive tests showed that the response of SnO2 hollow nanofibers to ethanol at a concentration of 100 ppm reached 27.13 at the optimum temperature of 350°C. The response and recovery times were 42 and 35 seconds, respectively, and the theoretical detection limit of the sensor was as low as 2.944 ppm. Density functional theory (DFT) calculations demonstrated that the adsorption mechanism of ethanol gas on the surface of tin dioxide was due to impedance change caused by electron transfer, making it more selective towards ethanol gas.
IEEE SENSORS JOURNAL
(2023)
Review
Materials Science, Multidisciplinary
Anindya Nag, Roy B. V. B. Simorangkir, Dinesh R. Gawade, Suresh Nuthalapati, John L. Buckley, Brendan O'Flynn, Mehmet Ercan Altinsoy, Subhas Chandra Mukhopadhyay
Summary: This paper presents a comprehensive review on the use of graphene for developing wearable temperature sensors. Flexible temperature sensors using various polymers and nanomaterials have been fabricated and widely used to detect temperature over a wide range in biomedical and industrial applications. Graphene, with its exceptional electrical, mechanical, and thermal properties, has been extensively employed for the development of wearable temperature sensors. The paper highlights significant works and suggests possible remedial steps to address the challenges in the current literature.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Katherine T. Young, Colter Smith, Timothy M. Krentz, Dale A. Hitchcock, Eric M. Vogel
Summary: This study presents the results of deuterium permeation experiments through chemical vapor deposited graphene on copper, revealing the impact of intrinsic defects on permeation. The findings suggest that grain boundaries are not the main diffusion pathways in graphene, and other intrinsic defects exhibit less resistance to permeation.
Article
Engineering, Electrical & Electronic
Kai Xu, Sheng Hu, Juntao Hu, Xianghua Wang
JOURNAL OF ELECTRONIC MATERIALS
(2019)
Article
Chemistry, Physical
Xianghua Wang, Xingfu Chen, Xinjun Wang, Juntao Hu, Yihui Wu, Wen-Hua Zhang
CHEMICAL PHYSICS LETTERS
(2020)
Article
Materials Science, Multidisciplinary
Qiangying Wang, Guo Sun, Shiming Wei, Wentao Hao, Wen Yang
Summary: A film-type detector was fabricated from hyperbranched fluorescent poly(amido amine) (HPAMAM) and polymethyl methacrylate (PMMA) through electrospinning to detect cobalt ion in aqueous solution with high sensitivity and selectivity. The fluorescence quenching obeys the Stern-Volmer law in a linear range of 1-50 mu M, providing an effective route to fabricate film-type detectors from nonconjugated fluorescent polymers.
Article
Physics, Applied
Xianghua Wang, Wenbin Li, Xudong Zhao, Jing Fu, Guobing Zhang, Wei Ma, Wen-Hua Zhang, Hoi Wai Choi
Summary: Surface passivation and wavelength modulation were achieved by post-synthesis ligand exchange reaction and hot-injection synthesis using aminopropyl-functionalized siloxane, resulting in enhanced optical performance and wide color gamut.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Environmental
Qiangying Wang, Guo Sun, Qingdong Tong, Wen Yang, Wentao Hao
Summary: This paper summarizes the research progress on fluorine-free superhydrophobic coatings, focusing on nonfluorinated polydimethylsiloxane (PDMS) fabrication methods and their pros and cons. The study indicates that these methods are applicable not only to PDMS, but also to coatings composed of other non-fluorinated compounds.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Optics
Xianghua Wang, Yong Yang, Xuedong Li, Wenbin Li, Juntao Hu, Wen-Hua Zhang
Summary: Inorganic cesium lead halide perovskite nanocrystals are synthesized using a modified hot injection method with in situ passivation of surface defects. The surface chemistry and lattice structure of the nanocrystals differ from those obtained through a postsynthesis exchange strategy. The emission wavelength and photoluminescence quantum yield of the nanocrystals can be tuned by adjusting the halide ratio, and the in situ passivation treatment shows promise for electroluminescence in light-emitting diodes.
Article
Polymer Science
Wen Yang, Qingdong Tong, Yuqing Li, Qianqian Li, Qiannan Zheng, Wentao Hao
Summary: This study successfully fabricates multifunctional films with self-healing, responsiveness, and electromagnetic interference shielding abilities. The films demonstrate autonomous recovery of electrical conductivity and mechanical strength, and exhibit dual responsiveness to temperature and strain. Additionally, the films possess excellent electromagnetic interference shielding effectiveness, making them highly promising for commercial applications.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Polymer Science
Zhongming Lv, Wentao Hao, Feiyun Xiao, Pin Chen, Zhengshi Liu, Yong Wang
Summary: Soft actuators are important for soft robotics, and particle reinforcement can improve their performance. This study investigates soft pneumatic actuators made of silicone rubber with embedded ultrahigh molecular weight polyethylene particles through experiments and simulations.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Tianyu Chen, Gewen Xu, Junjie Bao, Yiping Huang, Wen Yang, Wentao Hao
Summary: Hydrogel wound dressings incorporating Bletilla Striata Polysaccharide (BSP) have potential in clinical treatment due to their high hemostatic ability, absorption capacity, softness, non-toxicity, and non-irritating properties. This study proposes a simple one-pot method for preparing hydrogel wound dressings by mixing BSP aqueous solution with isocyanate terminated polyurethane. The resulting hydrogels can rapidly absorb exudates, retain them effectively, remove radicals, promote blood coagulation, and exhibit good biocompatibility. Most importantly, the hydrogels show excellent ability in promoting wound healing.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Engineering, Biomedical
Tianyu Chen, Xiaoyan Guo, Yiping Huang, Wentao Hao, Sunyan Deng, Gewen Xu, Junjie Bao, Qiansheng Xiong, Wen Yang
Summary: Polysaccharides are widely used in biomedicine due to their unique biological activity, low costs, and easy accessibility. In this study, Bletilla striata polysaccharide (BSP) was integrated into waterborne polyurethane (WPU) to prepare a series of hydrogels. These hydrogels showed good performance in terms of compressive strength, water absorption and retention, and biocompatibility. The WPUB hydrogel dressings demonstrated excellent ability in promoting wound healing, with reduced wound surface area and improved skin quality compared to conventional gauze.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2023)
Article
Nanoscience & Nanotechnology
Xianghua Wang, Shaoqi Zhuo, Jing Fu, Xuedong Li, Xudong Zhao, Hao Jiang, Ge Lv, Pengbo Li, Jiafa Li, Wen-Hua Zhang, Wei Ma
Summary: Rational ligand passivation is crucial for enhancing the performance of weakly confined lead halide perovskite quantum dots (PQDs) through surface chemistry and/or microstrain. In situ passivation with 3-mercaptopropyltrimethoxysilane (MPTMS) improves the photoluminescence quantum yield (PLQY) of CsPbBr3 PQDs up to 99% and enhances charge transport in the PQD film by one order of magnitude.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Thermodynamics
Wentao Hao, Qiannan Zheng, Xiang Zhang, Yuqing Li, Longzhen Qiu, Hongbo Lu, Wenping Wang, Wen Yang
Summary: In order to improve the flame retardancy and water repellency of PLA fabrics, co-electrospinning of PLA with DiDOPO was performed. The experimental results showed that DiDOPO provided good protection for PLA fabrics, exhibiting better flame retardancy compared to bulk PLA during combustion. Moreover, the electrospun PLA/DiDOPO fabrics also showed improved water repellency and increased strength and toughness.
THERMOCHIMICA ACTA
(2023)
Article
Engineering, Electrical & Electronic
Xianghua Wang, Zhiliang Xu, Shaoqi Zhuo, Peng Hu, Yong Yang, Bin Zhou, Wen-Hua Zhang
Summary: High performance CsPbBr3 nanocrystals were synthesized via a hot injection method followed by a room-temperature ligand exchange modification, leading to near unity photoluminescence quantum yield (PLQY). The NCs' surface was passivated through S-Pb polar covalent bonding to promote crystal growth. By mixing with Cs3PrCl6 NCs for controlled halide exchange and Pr doping, blue emission from the Pr-doped CsPb(Cl/Br)(3) NCs was achieved with optimized brightness.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Wei Nie, Qingdong Tong, Qianqian Li, Wen Yang, Wentao Hao
Summary: The multifunctional EMI shielding composite fabricated from waste rock wool, converted into valuable EMI material through a simple process, shows excellent EMI shielding performance, hydrophobicity, thermal insulation, and fire-retardant ability. This strategy not only solves the issue of waste rock wool pollution but also promotes the large-scale manufacturing of multifunctional EMI shielding materials.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Nutrition & Dietetics
Lei Sang, Lin Tang, Wen-Tao Hao, Peng Cui
CURRENT TOPICS IN NUTRACEUTICAL RESEARCH
(2019)
