Article
Multidisciplinary Sciences
Jiabin Shen, Shujing Jia, Nannan Shi, Qingqin Ge, Tamihiro Gotoh, Shilong Lv, Qi Liu, Richard Dronskowski, Stephen R. Elliott, Zhitang Song, Min Zhu
Summary: The research introduces a single-element tellurium (Te) volatile switch with high drive current density, large ON/OFF current ratio, and fast switching speed, which may help realize denser memory chips.
Article
Chemistry, Multidisciplinary
Chunsong Zhao, Humberto Batiz, Bengisu Yasar, Hyungjin Kim, Wenbo Ji, Mary C. Scott, Daryl C. Chrzan, Ali Javey
Summary: Thermally evaporated tellurium exhibits interesting crystallization behavior with a transition from amorphous to crystalline phase near ambient temperature. By visualizing and modeling the kinetics and dynamics of the crystallization process, precise control has been achieved to produce highly crystalline tellurium films with large grain size and preferred out-of-plane orientation. This has led to the realization of tellurium single crystals with improved electrical properties for applications such as field-effect transistors.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Manodeep Mondal, Rajesh Ganapathy
Summary: Extending atomic epitaxy concepts to colloidal systems has attracted scientific interest. Spatially ordered colloidal crystals have been realized on soft lithographically fabricated moire patterns. The interplay between lattice misfit strain and topographically varying surface potential within the moire unit cell significantly alters the nucleation process, and multiple levels of hierarchy can be achieved by tuning the moire angle.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Marisa A. Choffel, Taryn Mieko Kam, David C. Johnson
Summary: The products formed depended on the electronic properties of the second constituent. Bi2Se3-containing heterostructures were formed with semiconductor layers, while BiSe-containing heterostructures were formed with metallic layers. The electronic structure of adjacent layers impacts the formation of different structures from layers with similar local compositions.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Chenyang Xing, Zihao Li, Jian Bang, Songrui Wei, Zhengchun Peng
Summary: In this study, one-dimensional TeSe nanorods were synthesized and used as photosensitizers in photoelectrochemical-type photodetectors (PDs). The TeSe NR-based PDs showed favorable photo-response performance in the UV-Vis-NIR range and even simulated sunlight, along with long duration and cycling stability of on-off switching. These findings suggest that TeSe NR-based PDs have potential applications in marine monitoring.
Article
Chemistry, Multidisciplinary
Mekhola Sinha, Hector K. Vivanco, Cheng Wan, Maxime A. Siegler, Veronica J. Stewart, Elizabeth A. Pogue, Lucas A. Pressley, Tanya Berry, Ziqian Wang, Isaac Johnson, Mingwei Chen, Thao T. Tran, W. Adam Phelan, Tyrel M. McQueen
Summary: The discovery of spontaneous, bidirectional, bilayer twisting in metallic kagome MgCo6Ge6 reveals interesting insights into the properties of layered materials. The cooperative twisting between layers stabilizes the network and leads to the presence of alternative stacking sequences. The results provide crucial information on the electronic structures and behaviors of these materials.
ACS CENTRAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Mike Tebyetekerwa, Jian Zhang, Sandra Elizabeth Saji, Ary Anggara Wibowo, Sharidya Rahman, Thien N. Truong, Yuerui Lu, Zongyou Yin, Daniel Macdonald, Hieu T. Nguyen
Summary: Theoretical studies predict a wide range of interlayer exciton emission energy amplitudes in twisted two-dimensional heterobilayer transition metal dichalcogenides. However, experimental studies have reported a narrower depth of emission than predicted. In MoS2/WS2 vertical heterobilayers, the twist angle drive induces a wide degree of freedom for the indirect interlayer exciton emission, attributed to the close interlayer spacing and tuneability at various twist angles.
CELL REPORTS PHYSICAL SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Debadrita Bhattacharya, Arin Bhakat, Tushar Debnath
Summary: Researchers have successfully controlled the self-assembly of Te-based MnCs to arrest the growth of AgInTe2 quantum dots (QDs) by using a synergistic capping agent. This has led to the formation of evenly distributed AgInTe2-ZnS Janus nanocrystals with significantly reduced Te-oxidative properties.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Kenta Sudo, Yuki Yanagi, Takeshi Takahashi, Kim-Khuong Huynh, Katsumi Tanigaki, Kaya Kobayashi, Michi-To Suzuki, Motoi Kimata
Summary: This study reports the influence of strong spin-valley coupling in chiral tellurium on electronic structures and nonreciprocal transport. The observed nonreciprocal magnetoresistance exhibits anomalous suppression in high magnetic fields, contradicting the linearity of nonreciprocal signals to the fields observed in other materials. The study also reveals the essential role of valley degree of freedom in cross-correlation phenomena in chiral materials, in addition to the discussed spin-charge coupling.
Article
Chemistry, Multidisciplinary
Ralf Albrecht, Michael Ruck
Summary: The reaction of chalcogen dioxides with As2O3 in a high-temperature hydroflux solution resulted in the formation of potassium trichalcogenides crystals with dimensions up to 2 cm. The new heterochalcogenide anion was formed during the process. The reduced activity of water played a key role in the unexpected redox reaction and precipitation of hygroscopic compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Haihong Zheng, Biao Wu, Shaofei Li, Jun He, Keqiu Chen, Zongwen Liu, Yanping Liu
Summary: The modulation of moire potential and intralayer excitons in WS2/WS2 homostructure is observed in this study. By adjusting the twist angle, the depth of the moire potential can be modulated, and the confinement effect of the moire potential on intralayer excitons is demonstrated. Furthermore, atomic reconstructions are detected using low-frequency Raman mapping to ensure the uniformity of interlayer coupling.
Article
Chemistry, Physical
Haihong Zheng, Biao Wu, Shaofei Li, Jun He, Keqiu Chen, Zongwen Liu, Yanping Liu
Summary: We report the modulation of moire potential and intralayer excitons in the WS2/WS2 homostructure. By adjusting the torsion angle of the homobilayers, the depth of the moire potential can be modulated. The confinement effect of the moire potential on the intralayer excitons was demonstrated through temperature and valley polarization changes. Furthermore, atomic reconstructions were detected using low-frequency Raman mapping, providing insights into the inhomogeneities in moire lattices on a large scale and promoting the study of electrical engineering and topological photonics.
Article
Chemistry, Physical
Henry Rui He, Haihong Zheng, Biao Wu, Shaofei Li, Junnan Ding, Zongwen Liu, Jian-Tao Wang, Anlian Pan, Yanping Liu
Summary: Researchers have achieved precise localization of moire excitons by combining strain engineering and twisted bilayers of WSe2. They discovered highly localized moire-enhanced emission with multiple distinct emission lines at low temperatures, and successfully regulated the depth of the moire potential through strain engineering.
Editorial Material
Chemistry, Physical
Pascal Pochet, Harley T. T. Johnson
Summary: Using a precise folding-tearing technique, scientists have created screw dislocations with helical cores that appear in pairs and form a DNA-like double-helix structure. These dislocations are engineered to control the growth of twisted bilayer graphene.
Review
Chemistry, Multidisciplinary
Ziyi Han, Lin Li, Fei Jiao, Gui Yu, Zhongming Wei, Dechao Geng, Wenping Hu
Summary: This review discusses the growth of single-crystal 2D materials using CVD, with a focus on single-seed and multi-seed methods. Multi-seed approach is considered more effective for industrial production due to its ability to achieve seamless merging of oriented domains and continuous growth. The unique features and growth mechanisms of various 2D materials are explored, along with potential applications in electronics, optics, and coatings. Current challenges and future directions in the field of continuous orientated growth of scaled 2D crystals are also outlined.
NANOSCALE ADVANCES
(2021)
Article
Physics, Applied
T. Schenkel, A. M. Snijders, K. Nakamura, P. A. Seidl, B. Mak, L. Obst-Huebl, H. Knobel, I. Pong, A. Persaud, J. van Tilborg, T. Ostermayr, S. Steinke, E. A. Blakely, Q. Ji, A. Javey, R. Kapadia, C. G. R. Geddes, E. Esarey
Summary: Nanostructured surfaces increase ion yields in MALDI-MS. The spike protein complex, S1, is a fingerprint signature of Sars-CoV-2 with a mass of 75 kDa. We demonstrate a 50-fold enhancement in MALDI-MS yields of Sars-CoV-2 spike protein ions in the 100 kDa range when the matrix-analyte solution is placed on substrates coated with a dense forest of multi-walled carbon nanotubes, compared to uncoated substrates. Nanostructured substrates have the potential to advance mass spectrometry techniques for sensitive pathogen detection and environmental monitoring.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Kun Hu, Min Wang
Summary: A new coupling tuning mechanism for regulating the near-open-circuit resonance frequency of piezoelectric energy harvesters (PEHs) by changing the effective electrode coverage (EEC) is presented. Theoretical analysis and experimental results demonstrate remarkable improvements in both bandwidth and average power through the coupling resonance frequency tuning method. Extraordinary piezoelectric single crystals and optimizing the proof mass and piezoelectric layer dimensions are effective methods for further improvement of bandwidth.
Article
Materials Science, Multidisciplinary
Manik Dautta, Luis Fernando Ayala-Cardona, Noelle Davis, Ashwin Aggarwal, Jonghwa Park, Shu Wang, Liam Gillan, Elina Jansson, Mikko Hietala, Hyunhyub Ko, Jussi Hiltunen, Ali Javey
Summary: Monitoring sweat secretion rate is crucial for detecting physical conditions such as hyperhidrosis, mental stress, and neural disorders. A tape-free device, consisting of a 3D-printed sweat collector with a concave surface that tightly seals onto the skin, is presented as a solution to integrate sweat rate monitoring with commercial wearables. The optimized materials, structure, and dimensions of the device ensure conformal contact with the skin and efficient capture of sweat. This device, enabled by a fluidic microchannel with embedded electrodes, allows for continuous digital monitoring of sweat rate, providing valuable insights into long-term exercise-induced local sweat rates and their correlation with total body fluid loss.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Editorial Material
Chemistry, Multidisciplinary
Jillian M. Buriak, Deji Akinwande, Natalie Artzi, C. Jeffrey Brinker, Cynthia Burrows, Warren C. W. Chan, Chunying Chen, Xiaodong Chen, Manish Chhowalla, Lifeng Chi, William Chueh, Cathleen M. Crudden, Dino Di Carlo, Sharon C. Glotzer, Mark C. Hersam, Dean Ho, Tony Y. Hu, Jiaxing Huang, Ali Javey, Prashant V. Kamat, Il-Doo Kim, Nicholas A. Kotov, T. Randall Lee, Young Hee Lee, Yan Li, Luis M. Liz-Marzan, Paul Mulvaney, Prineha Narang, Peter Nordlander, Rahmi Oklu, Wolfgang J. Parak, Andrey L. Rogach, Mathieu Salanne, Paolo Samori, Raymond E. Schaak, Kirk S. Schanze, Tsuyoshi Sekitani, Sara Skrabalak, Ajay K. Sood, Ilja K. Voets, Shu Wang, Shutao Wang, Andrew T. S. Wee, Jinhua Ye
Review
Chemistry, Multidisciplinary
Yifei Luo, Mohammad Reza Abidian, Jong-Hyun Ahn, Deji Akinwande, Anne M. Andrews, Markus Antonietti, Zhenan Bao, Magnus Berggren, Christopher A. Berkey, Christopher John Bettinger, Jun Chen, Peng Chen, Wenlong Cheng, Xu Cheng, Seon-Jin Choi, Alex Chortos, Canan Dagdeviren, Reinhold H. Dauskardt, Chong-an Di, Michael D. Dickey, Xiangfeng Duan, Antonio Facchetti, Zhiyong Fan, Yin Fang, Jianyou Feng, Xue Feng, Huajian Gao, Wei Gao, Xiwen Gong, Chuan Fei Guo, Xiaojun Guo, Martin C. Hartel, Zihan He, John S. Ho, Youfan Hu, Qiyao Huang, Yu Huang, Fengwei Huo, Muhammad M. Hussain, Ali Javey, Unyong Jeong, Chen Jiang, Xingyu Jiang, Jiheong Kang, Daniil Karnaushenko, Ali Khademhosseini, Dae-Hyeong Kim, Il-Doo Kim, Dmitry Kireev, Lingxuan Kong, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Lee, Fengyu Li, Jinxing Li, Cuiyuan Liang, Chwee Teck Lim, Yuanjing Lin, Darren J. Lipomi, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Liu, Xian Jun Loh, Nanshu Lu, Zhisheng Lv, Shlomo Magdassi, George G. Malliaras, Naoji Matsuhisa, Arokia Nathan, Simiao Niu, Jieming Pan, Changhyun Pang, Qibing Pei, Huisheng Peng, Dianpeng Qi, Huaying Ren, John A. Rogers, Aaron Rowe, Oliver G. Schmidt, Tsuyoshi Sekitani, Dae-Gyo Seo, Guozhen Shen, Xing Sheng, Qiongfeng Shi, Takao Someya, Yanlin Song, Eleni Stavrinidou, Meng Su, Xuemei Sun, Kuniharu Takei, Xiao-Ming Tao, Benjamin C. K. Tee, Aaron Voon-Yew Thean, Tran Quang Trung, Changjin Wan, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Wang, Paul S. Weiss, Hanqi Wen, Sheng Xu, Tailin Xu, Hongping Yan, Xuzhou Yan, Hui Yang, Le Yang, Shuaijian Yang, Lan Yin, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Yu, Evgeny Zamburg, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhang, Siyuan Zhao, Xuanhe Zhao, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zheng, Tao Zhou, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zhu, Guijin Zou, Xiaodong Chen
Summary: Humans are increasingly relying on flexible sensors to address challenges and improve quality of life in the digital and big data era. However, the market adoption of flexible sensors is still limited despite advancements in research. In this paper, we identify the bottlenecks hindering the maturation of flexible sensors and propose potential solutions to expedite their deployment and commercialization.
Article
Chemistry, Multidisciplinary
Sivacarendran Balendhran, Mohammad Taha, Shifan Wang, Wei Yan, Naoki Higashitarumizu, Dingchen Wen, Nima Sefidmooye Azar, James Bullock, Paul Mulvaney, Ali Javey, Kenneth B. Crozier
Summary: Flexible optoelectronics is a rapidly growing field with a wide range of potential applications, but current devices have limitations in their spectral range. This study demonstrates flexible photodetectors using a VOx nanoparticle ink, with an extremely broad operating wavelength range of 0.4 to 20 μm. These devices show mechanical flexibility, wide spectral response, and ease of fabrication, making them highly desirable for various applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Song Li, Yu-Fei Zhai, Shah Fahad, Ying Jin, Yu-Xuan Dong, Xuan-Zheng Zhou, Yun-Heng Wang, Min Wang
Summary: This article reports an electrospun poly(vinylidene fluoride-trifluorethylene) (P(VDF-TrFE)) nanofiber film used as an adiabatic support structure in thermal sensor array and investigates its effect on imaging performance of thermal sensor. The thermal conductivities of electrospun P(VDF-TrFE) films with different packing ratios were theoretically calculated, showing a significant decrease compared with the spin-coated counterpart. The method of improving thermal isolation performance using electrospun fibrous film could be of great advantage to high-sensitivity infrared imaging sensor.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Cong Zhao, Fang-Mei Li, Xiao-Ying Pan, Song Li, Yu-Fei Zhai, Shah Fahad, Hong-Yu Yu, Min Wang
Summary: This article proposes a flexible lateral-circuited piezoresistive sensor with a mechanotransduction structure. The sensor uses zirconia microspheres to weaken load dissipation and amplify mechanical stimulation, resulting in high sensitivity, wide detection range, fast response/recovery time, and high stability.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jongchan Kim, Vivian Wang, Seung Chan Kim, Jun Yeob Lee, Ali Javey
Summary: We demonstrate an AC-driven light emitting capacitor that can change the color of the emission spectra by adjusting the applied AC frequency. The device has a simple MOS capacitor structure with an organic emissive layer, allowing for easy fabrication. The emission of low energy dyes dominates at low frequency, while the emission of high energy dyes from the host matrix dominates at high frequency. This color tunable device has potential applications in future full-color displays and lighting.
Article
Nanoscience & Nanotechnology
Naoki Higashitarumizu, Shiekh Zia Uddin, Daniel Weinberg, Nima Sefidmooye Azar, I. K. M. Reaz Rahman, Vivian Wang, Kenneth B. B. Crozier, Eran Rabani, Ali Javey
Summary: The photophysics of black phosphorus, an optoelectronic material, was investigated. It was found that the photoluminescence quantum yield initially decreases with decreasing thickness due to enhanced surface carrier recombination, but sharply increases afterwards. Furthermore, black phosphorus exhibits a much lower surface carrier recombination velocity compared to other semiconductors.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Min Wang, Yao Chen, Shunsheng Zhao, Cenkai Zhao, Guanxiong Wang, Mingbo Wu
Summary: Nowadays, biomass has become an important source for synthesizing carbon nanomaterials due to their low cost, easy accessibility, large quantity, and rapid regeneration properties. In this study, fresh daikon was used as the precursor to synthesize nitrogen-doped carbon with hierarchical porous architecture. The resulting material exhibited excellent electrocatalytic performance for oxygen reduction reaction in both alkaline and acidic medium, as well as good durability, CO and methanol tolerance in different electrolytes. Furthermore, it showed promising performance as a cathode catalyst for proton exchange membrane fuel cells.
FRONTIERS IN CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Vivian Wang, Shiekh Zia Uddin, Junho Park, Ali Javey
Summary: In this work, a highly multicolored light-emitting array with 49 different, individually addressable colors on a single chip is demonstrated. The array consists of pulsed-driven metal-oxide-semiconductor capacitors that generate electroluminescence from microdispensed materials, allowing arbitrary light spectra to be generated across a broad wavelength range. When combined with compressive reconstruction algorithms, these arrays can be used for compact spectroscopic measurements without diffractive optics. As an example, microscale spectral imaging of samples is demonstrated using a multiplexed electroluminescent array in conjunction with a monochrome camera.
Article
Chemistry, Multidisciplinary
Jin Hu, Kang Xu, Peilin Huang, Min Wang, Shaolin Xu, Qi-Huo Wei
Summary: Wideband perfect absorbers are in high demand for applications such as efficient photodetection and radiation cooling. This study introduces a novel hierarchical conical metasurface that achieves perfect absorption from visible to far-infrared wavelengths through surface-engraved nanogratings on microcones. The underlying mechanisms, including surface phonon polaritons and light trapping, are examined. This technology shows significant promise for applications in photodetectors.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ashwin Aggarwal, Manik Dautta, Luis Fernando Ayala-Cardona, Aalaya Wudaru, Ali Javey
Summary: The rapid advancements in wearable technologies have enabled the development of personal monitoring systems for core bodily metrics. Current smartwatches accurately monitor physical signals like heart rate and respiratory rate, but they are unable to track several important physiological parameters, including sweat rate. This study presents a new wearable device that can track sweat rate using an off-the-shelf humidity sensor. The device features a 3D-printed chamber with a humidity sensor and microheater, and it interfaces with the skin using a malleable and concave sweat collector. Through experiments, the authors aim to understand the relationship between sweat-induced humidity and the amount of sweat secreted. Compared to existing sweat rate sensing devices, this hygrometer-based device is more comfortable for extended wear and can be used alongside microfluidic-based sweat rate devices.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Bengisu Sari, Steven E. Zeltmann, Chunsong Zhao, Philipp M. Pelz, Ali Javey, Andrew M. Minor, Colin Ophus, Mary C. Scott
Summary: In recent years, there has been a growing interest in 2D non-graphene materials, with tellurium (Te) as a single-element van der Waals semiconductor gaining attention due to its anisotropic physical properties. Combining electron microscopy with image simulations, researchers have determined the precise orientation of Te flakes on a WSe2 substrate and analyzed the resulting moire lattice structure. Additionally, local strain within the Te/WSe2 layered materials was investigated using scanning nanodiffraction techniques.
