Article
Materials Science, Multidisciplinary
James Utama Surjadi, Yongsen Zhou, Siping Huang, Liqiang Wang, Maoyuan Li, Sufeng Fan, Xiaocui Li, Jingzhuo Zhou, Raymond H. W. Lam, Zuankai Wang, Yang Lu
Summary: A low-cost and facile pyrolysis process called partial carbonization is used to enhance the strength and ductility of a 3D-printed brittle photopolymer microlattice. This method increases the specific energy absorption and improves biocompatibility, making it suitable for various applications including biomedical. The study proposes the possibility of creating hybrid carbon mechanical metamaterials with lightweight, high toughness, and versatile geometries.
Article
Construction & Building Technology
Ye Shi, Guangcheng Long, Xiaohui Zeng, Youjun Xie, Huihui Wang
Summary: GUHPC, with very low cement content, shows good mechanical performance and low environmental impact. Enhancing chemical effects through nanomaterials and chemical activator, along with multi-scale particles system, can improve the initial packing density of GUHPC.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ye Shi, Guangcheng Long, Xiaohui Zeng, Youjun Xie, Huihui Wang
Summary: The development of Green Ultra-High Performance Concrete (GUHPC) has attracted attention in the construction industry, with the potential to achieve high mechanical performance and low environmental impact by adding nanomaterials and chemical activator. Experimental results show that GUHPC with good mechanical properties and low environmental impact can be prepared with low cement content.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Joao Mouro, Paolo Paoletti, Marco Sartore, Bruno Tiribilli
Summary: This study introduces a new platform that can sense the mass or rheological properties of gases with exceptionally high responsivity and limits of detection. The platform consists of a microcantilever operated in a phase-locked loop (PLL) with a predetermined phase between its excitation and deflection signals. The optically detected cantilever deflection is demodulated against synthesized reference signals, and the quadrature component (Q-signal) is used as an error parameter in a PI controller for continuous frequency tracking. By digitally synthesizing the reference and actuation signals, the sensor achieves low noise and fast transient responses for real-time detection of minute changes in environmental parameters. The analytical model derived in this study is used to understand the dynamic response of the platform and validated through experiments using different gases and pressures. The responsivity of the sensor to density variations and the stability of its frequency response are investigated, and the achieved limit of detection for density variations is significantly lower than previously reported values for similar resonant sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Multidisciplinary Sciences
James Utama Surjadi, Yongsen Zhou, Tianyu Wang, Yong Yang, Ji-Jung Kai, Yang Lu, Zuankai Wang
Summary: The study fabricates 3D architected organohydrogels with specific energy absorption that can be readily tuned over an unprecedented range utilizing hydrogen bonding and metal coordination. These materials also possess anti-freezing and non-drying properties. Overall, this work demonstrates a new type of architected metamaterials with the ability to produce a large range of mechanical properties using only a single material system.
Article
Chemistry, Multidisciplinary
Komal Chawla, Abhishek Gupta, Ramathasan Thevamaran
Summary: Creating lightweight architected foams as strong and stiff as their bulk constituent material has always been a challenge. However, through the use of hierarchical vertically aligned carbon nanotube foams, we have successfully achieved constant stiffness-to-density and energy dissipation-to-density ratios, enabling a linear scaling with density. This transformation not only improves the foams' structural stiffness at low densities, but also enhances their damping capacity and energy absorption efficiency, allowing access to the ultra-lightweight regime in the property space. Such synergistic scaling of material properties is highly desirable for protective applications in extreme environments.
Article
Physics, Applied
Chunfeng Cui, Qingyi Liu, Tao Ouyang, Jin Li, Chaoyu He, Chunxiao Zhang, Chao Tang, Jianxin Zhong
Summary: The natural van der Waals material KP15 exhibits obvious anisotropic lattice thermal conductivity and electronic transport properties, with extremely low intertube thermal conductivity at room temperature, which is beneficial for thermoelectric performance. Additionally, KP15 shows relatively high Seebeck coefficients and excellent thermoelectric performance under n-type doping, with a potential thermoelectric figure of merit as high as 1.40 at 700K.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Zhihao Sun, Zhaoqian Yan, Kaicheng Yue, Anran Li, Lei Qian
Summary: A composite material of nitrogen-doped reduced graphene oxide and carbon nanotubes was prepared, showing remarkable microwave absorption performance due to the formation of conductive pathways, nest-like CNTs clusters, and abundant defect polarization within the composite. The multi-scale structure endowed the composite with well-matched impedance, rich loss modes, and strong losses, resulting in an effective bandwidth of 7.1 GHz with a minimum reflection loss of -49.4 dB at only 2 wt% loading.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Dengke Wang, Jiapeng Zhang, Xiaotian Li, Lantao Liu, Man Yuan, Bin Cao, Ang Li, Xiaohong Chen, Ru Yang, Huaihe Song
Summary: The potassium ion battery anode constructed with graphitic carbon microspheres demonstrates stable performance, increased capacity, high power density, and outstanding low temperature performance, showing great potential for application in low temperature scenarios.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xuwei Liu, Chaozhen Liu, Xun He, Zhengwei Cai, Kai Dong, Jun Li, Xiaoya Fan, Ting Xie, Xiya Yang, Yonglan Luo, Dongdong Zheng, Shengjun Sun, Sulaiman Alfaifi, Feng Gong, Xuping Sun
Summary: In this study, a high-efficiency NO3-RR electrocatalyst Fe-Co3O4/PC was proposed for NH3 production. The experimental results showed that Fe-Co3O4/PC exhibited a high NH3 yield and Faradaic efficiency in alkaline environment, superior to its counterpart Co3O4/PC. The study also investigated the reaction mechanism of Fe-Co3O4 for NO3-RR through theoretical calculations.
Article
Chemistry, Multidisciplinary
Anton B. Resing, Chase Fukuda, Jorg G. Werner
Summary: To optimize the performance of energy storage devices, tailored electrode architectures are required to address mass transport limitations at high current rates. The use of adjustable parameters in the electrode design can enhance electrochemical and structural stability.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Applied
Xun Gao, Hassnain Asgar, Ivan Kuzmenko, Greeshma Gadikota
Summary: The use of earth abundant silicates for carbon dioxide removal and resource recovery is gaining attention, but the heterogeneity of naturally occurring minerals poses challenges for scaled-up processes. This study proposes a novel synthesis route for producing crystalline magnesium silicates with ordered mesoporous structures, overcoming the limitations of conventional methods. The synthesized magnesium silicate particles have highly ordered pores and a specific surface area suitable for various applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Composites
Yahao Liu, Yuansheng Wang, Xue Yang, Jian Zheng, Wei Huang, Yu Zhang, Xiao Zhang, Xuan Wang
Summary: This study developed a novel lightweight metal foam and embedded it into a designed stiffness variable polymer to fabricate a polymer composite with superior stiffness switchable capacity. The composite shows excellent conductivity, high stiffness switch ratio, as well as shape memory and self-healing characteristics. It was then applied as the stiffness changing units in soft actuators, which demonstrated short heating-cooling cycle time and remarkable stiffness and net force values.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Wei Qin, Yushan You, Yu Song, Jinrong Yin, Yang Zhou, Zhenyong Li, Zhen Zeng, Min Xu, Wenjiao Chen, Xianyan Ren
Summary: The development of slick-water fracture technology requires polymer ultra-low-density proppants, but these tend to deform under high pressure. To overcome this, carbon dots were introduced to increase the stiffness of the styrene-divinylbenzene copolymer (SDB) and obtain the desired ultra-low-density proppants. The synthesis conditions of carbon dots modified SDB microspheres (CDs-SDBs) were optimized, resulting in proppants with high-peak pressure and minimal axial deflection. The density of the CDs-SDBs remained constant with increasing amounts of carbon dots.
POLYMER COMPOSITES
(2023)
Article
Nanoscience & Nanotechnology
Yuanhong Huang, Lujie Wei, Tingting Chen, Tianhang Xu, Yifei Cai, Yayi Guo, Yangsu Xie
Summary: This work synthesizes carbon nanotube aerogel films (CAFs) and characterizes their thermal and electrical transport properties using transient electrothermal (TET) technology. The CAFs have ultra-low thermal conductivity and thermal diffusivity, and demonstrate good sensitivity and fast response as a bolometer for detecting infrared radiation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Thomas Voisin, Jean-Baptiste Forien, Aurelien Perron, Sylvie Aubry, Nicolas Bertin, Amit Samanta, Alexander Baker, Y. Morris Wang
Summary: The rapid solidification cellular structures in 316L austenitic stainless steels fabricated by laser powder-bed-fusion were found to have specific crystallographic orientations in cell walls, which act as barriers to dislocation movement and contribute to material strengthening. Additionally, oxide precipitates confined inside cell walls also enhance the material's strength. Overall, the understanding of these intrinsic characteristics and strengthening mechanisms can help improve the material's thermal stability and high strength.
Article
Chemistry, Physical
A. M. Engwall, L. B. Bayu Aji, A. A. Baker, S. J. Shin, J. H. Bae, S. K. McCall, J. D. Moody, S. O. Kucheyev
Summary: The study investigated the effects of substrate tilt on properties of gold-tantalum alloy films deposited by magnetron sputtering. It was found that the deposition rate and film density decrease with increasing substrate tilt angle, leading to changes in film properties such as porosity and electrical resistivity. The critical tilt angle for increased resistivity was determined to be between 40 and 60 degrees.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Applied
L. B. Bayu Aji, A. M. Engwall, A. A. Baker, J. L. Beckham, S. J. Shin, X. Lepro Chavez, S. K. McCall, J. D. Moodyl, S. O. Kucheye
Summary: Gold-tantalum alloy films are promising for use in magnetized inertial confinement fusion. Through systematic study, an alloy with around 80% tantalum was found to form a metallic glass exhibiting high electrical resistivity at low temperatures, making it suitable for applications requiring pulsed magnetic fields.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Jeong-Min Park, Yakai Zhao, Thomas Voisin, Dong-Hyun Lee, Shin-ichi Komazaki, Yoonseok Ko, Dong-Ik Kim, Jin-Yoo Suh, Heung Nam Han, Y. Morris Wang, Upadrasta Ramamurty, Jae-il Jang
Summary: The effect of hydrogen charging on the nanoindentation response of a selective laser melted 316L austenitic stainless steel was investigated. Results showed that the hardness increment due to hydrogen charging in SLM samples was relatively smaller compared to conventionally manufactured samples. The study also found that the charged SLM alloy had a lower hydrogen content and apparent hydrogen diffusivity, attributed to the ultrafine solidification cell structure in the SLM alloy. Additionally, the cell walls in the SLM alloy were relatively insensitive to hydrogen charging compared to the cell interiors.
SCRIPTA MATERIALIA
(2021)
Article
Physics, Applied
L. B. Bayu Aji, S. J. Shin, J. H. Bae, A. M. Engwall, J. A. Hammons, X. Lepro, N. Catarineu, P. B. Mirkarimi, S. O. Kucheyev
Summary: The influence of substrate temperature on the properties of B4C films deposited by DC magnetron sputtering was systematically studied. The results showed that the properties of the films are weakly dependent on the substrate temperature within a certain temperature range. However, within this range, an increase in substrate temperature leads to larger residual compressive stress and a reduction in nanoscale inhomogeneities.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Wenshu Chen, Jiajun Gu, Qinglei Liu, Mengzhao Yang, Cheng Zhan, Xining Zang, Tuan Anh Pham, Guangxiang Liu, Wang Zhang, Di Zhang, Bruce Dunn, Y. Morris Wang
Summary: This study presents a strategy to produce thickness-adjustable dense electrode films with fast ion transport channels, leading to high areal and volumetric capacitances. Density functional theory and ab initio molecular dynamics simulations reveal the crucial roles of hydration and nanoscale channels in enabling ultrafast ion transport and enhanced charge storage in these films.
NATURE NANOTECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
T. Voisin, R. Shi, Y. Zhu, Z. Qi, M. Wu, S. Sen-Britain, Y. Zhang, S. R. Qiu, Y. M. Wang, S. Thomas, B. C. Wood
Summary: The first part of this article reviews the microstructures found in LPBF 316L SS and their impact on corrosion properties, with a focus on pitting resistance. The second part discusses relevant modeling techniques for simulating the corrosion of LPBF 316L SS and identifies current challenges that need to be addressed.
Article
Multidisciplinary Sciences
Jie Ren, Yin Zhang, Dexin Zhao, Yan Chen, Shuai Guan, Yanfang Liu, Liang Liu, Siyuan Peng, Fanyue Kong, Jonathan D. Poplawsky, Guanhui Gao, Thomas Voisin, Ke An, Y. Morris Wang, Kelvin Y. Xie, Ting Zhu, Wen Chen
Summary: Through laser powder bed fusion, we have successfully printed dual-phase nanolamellar high-entropy alloys with high yield strength and large uniform elongation. The high yield strength is attributed to the dual-phase structure consisting of alternating face-centred cubic and body-centred cubic nanolamellae, while the large tensile ductility arises from the high work-hardening capability of the dual-phase nanolamellae embedded in microscale eutectic colonies.
Article
Materials Science, Multidisciplinary
Alexander A. Baker, Alison M. Engwall, Leonardus Bimo Bayu-Aji, John H. Bae, Swanee J. Shin, John D. Moody, Sergei O. Kucheyev
Summary: In this study, tantalum suboxide films with controlled composition were deposited using reactive direct-current magnetron sputtering. The films exhibited a wide range of electrical resistivity variations and a sharp change in resistivity and carrier density at an oxygen content of approximately 55%.
Article
Physics, Applied
S. J. Shin, L. B. Bayu Aji, A. M. Engwall, J. H. Bae, A. A. Baker, J. D. Moody, S. O. Kucheyev
Summary: By adjusting the oxygen content, we studied the electrical resistivity characteristics and the transition of conduction mechanism of Au-Ta-O films, providing a new thin film material alternative for hohlraums in magnetically assisted inertial confinement fusion.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
L. B. Bayu Aji, A. M. Engwall, S. J. Shin, J. H. Bae, A. A. Baker, D. J. Strozzi, S. K. McCall, J. D. Moody, S. O. Kucheyev
Summary: This study investigates the deposition of Au-Bi alloy films using direct current magnetron sputtering and characterizes the films using various techniques. The films are found to be polycrystalline, consisting of Au, Au2Bi, and Bi crystallographic phases. Films with high Bi content exhibit porosity.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
A. M. Engwall, L. B. Bayu Aji, S. J. Shin, A. A. Baker, J. H. Bae, S. K. McCall, J. D. Moody, S. O. Kucheyev
Summary: This article describes the process of manufacturing gold-tantalum alloy coatings using direct current magnetron sputter deposition, and discusses in detail the impact of deposition parameters on film microstructure and properties. Experimental findings are correlated with simulation results, and it is found that low-energy depositing species favor the formation of a specific phase.
Article
Chemistry, Multidisciplinary
Sichi Li, Maira R. Ceron, Hannah Eshelman, Anthony J. Varni, Amitesh Maiti, Sneha Akhade, Simon H. Pang
Summary: We investigated the oxidative degradation mechanism of polyamines through quantum chemistry, simulations, adsorbent synthesis, and degradation experiments, highlighting the critical role of aminoalkyl hydroperoxide decomposition in the process. We explained the observed variation in oxidative stability of polyamines with different backbone structures by the relationship between local chemical structure and the free energy barrier of aminoalkyl hydroperoxide decomposition, providing a theoretical basis for screening and designing more stable polyamines.
Article
Engineering, Manufacturing
Jean-Baptiste Foriena, Gabe M. Guss, Saad A. Khairallahb, William L. Smithb, Philip J. DePonda, Manyalibo J. Matthewsa, Nicholas P. Caltaa
Summary: Metal lattices are cellular materials that provide high-strength and lightweight structures. Additive manufacturing techniques have allowed for more complex lattice designs. However, defect creation in additive manufacturing can compromise the mechanical integrity. This study investigates the use of high-speed thermal emission measurements to identify defective struts in lattice structures produced with laser powder bed fusion.
ADDITIVE MANUFACTURING LETTERS
(2023)
Article
Chemistry, Physical
Joshua A. Hammons, J. Ali Espitia, Erika Ramos, Rongpei Shi, Frederick Meisenkothen, Marissa Wood, Maira R. Ceron, Jianchao Ye
Summary: This study aims to optimize the conductivity of garnet-type solid-state electrolytes at low sintering temperatures by understanding the chemical and microstructural evolution. The results show that sintering temperature and time have a significant impact on the electrolyte's performance, and different temperature ranges result in different chemical reactions and crystal structure changes.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)