Review
Chemistry, Multidisciplinary
Xiangdong Guo, Wei Lyu, Tinghan Chen, Yang Luo, Chenchen Wu, Bei Yang, Zhipei Sun, F. Javier Garcia de Abajo, Xiaoxia Yang, Qing Dai
Summary: 2D monolayers can be vertically stacked in van der Waals heterostructures to support a wide range of confined polaritons. This offers advantages in terms of controlling the constituent layers, stacking sequence, and twist angles. These heterostructures have extended the performance and functions of polaritons, and potential applications include nanophotonic integrated circuits.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
A. J. Sternbach, S. H. Chae, S. Latini, A. A. Rikhter, Y. Shao, B. Li, D. Rhodes, B. Kim, P. J. Schuck, X. Xu, X-Y Zhu, R. D. Averitt, J. Hone, M. M. Fogler, A. Rubio, D. N. Basov
Summary: Layered crystals, such as tungsten diselenide, can exhibit unconventional optical properties that allow for the propagation of subdiffractional waveguide modes with hyperbolic dispersion. This study demonstrates optically induced hyperbolicity in WSe2 and explores the role of quantum transitions of excitons in the observed polaritonic response.
Review
Chemistry, Multidisciplinary
Hui-Lei Hou, Cosimo Anichini, Paolo Samori, Alejandro Criado, Maurizio Prato
Summary: In the past 15 years, 2D materials have revolutionized materials science and become powerful components for high-performance chemical sensors. By forming van der Waals heterostructures (VDWHs), the individual drawbacks of 2D materials can be overcome, leading to superior sensitivities, selectivity, and stability. This review discusses the latest developments in chemical sensors based on VDWHs of 2D materials, including sensing mechanisms and future directions with potential impact in environmental sciences and biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Fang Wang, Tao Zhang, Runzhang Xie, Anna Liu, Fuxing Dai, Yue Chen, Tengfei Xu, Hailu Wang, Zhen Wang, Lei Liao, Jianlu Wang, Peng Zhou, Weida Hu
Summary: With the continuous advancement of nanofabrication techniques and the discovery of useful manipulation mechanisms in high-performance applications, the morphology and usage of junction devices in photodetectors have undergone fundamental revolution. New types of photodetectors, not relying on any junction, have emerged, offering high signal-to-noise ratio and multidimensional modulation. This review focuses on a unique category of material systems, van der Waals materials, which support novel high-performance photodetectors beyond junctions.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Long Zhang, Fengcheng Wu, Shaocong Hou, Zhe Zhang, Yu-Hsun Chou, Kenji Watanabe, Takashi Taniguchi, Stephen R. Forrest, Hui Deng
Summary: Controlling matter-light interactions with cavities is crucial in modern science and technology. By integrating MoSe2-WS2 heterobilayers in a microcavity, cooperative coupling between moire-lattice excitons and microcavity photons has been established, providing versatile control of both matter and light. This moire polariton system combines strong nonlinearity and microscopic-scale tuning of matter excitations, offering a platform to study collective phenomena from tunable arrays of quantum emitters.
Review
Chemistry, Multidisciplinary
Tianping Ying, Tongxu Yu, Yanpeng Qi, Xiaolong Chen, Hideo Hosono
Summary: By breaking traditional alloying strategy restrictions, the high entropy concept has expanded the field of alloy exploitation. This review focuses on the combination of the high entropy concept and van der Waals systems to create a new category of materials called high entropy van der Waals materials (HEX). The design strategy for HEX incorporates the local features of high entropy materials and the holistic degrees of freedom in van der Waals materials, successfully leading to the discovery of various high entropy compounds with desirable physical properties. Additionally, deliberate design of structural units and their stacking configuration in HEX can also enhance catalytic performance.
Article
Chemistry, Multidisciplinary
Jonathan M. Polfus, Marta Benthem Muniz, Ayaz Ali, Daniel A. Barragan-Yani, Per Erik Vullum, Martin F. Sunding, Takashi Taniguchi, Kenji Watanabe, Branson D. Belle
Summary: This study presents direct measurements of adhesion between 2D materials and reveals a significant reduction in adhesion energies with increasing temperature, mainly attributed to thermally induced ripples in the materials.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xiaoqing Chen, Yu Zhang, Ruijuan Tian, Xianghu Wu, Zhengdong Luo, Yan Liu, Xinran Wang, Jianlin Zhao, Xuetao Gan
Summary: A quadratically nonlinear photodetector (QNPD) composed of a van der Waals (vdW) stacked GaSe/InSe heterostructure is reported in this study. The QNPD exhibits unique electronic and optical attributes and extends the photodetection wavelength range from 900 to 1750 nm due to the extra second-harmonic generation (SHG) process in GaSe/InSe. It is highly sensitive to the variation of optical intensity and can be used as an autocorrelator for measuring ultrafast pulse widths and an optoelectronic mixer for signal processing.
Review
Materials Science, Multidisciplinary
Lixin Liu, Tianyou Zhai
Summary: The article reviews the latest research activities on wafer-scale vdWHs and their applications, outlining preparation strategies and applications to showcase their potential in electronic, optoelectronic, and flexible devices fields.
Article
Chemistry, Multidisciplinary
Maurits J. A. Houmes, Samuel Manas-Valero, Alvaro Bermejillo-Seco, Eugenio Coronado, Peter G. Steeneken, Herre S. J. van der Zant
Summary: This article investigates the structural anisotropy of CrPS4 and its relationship with magnetic phase transitions and discovers different mechanical response behavior compared to previously studied van der Waals magnets. The results demonstrate the potential of CrPS4 in the field of low-dimensional magnetism and show the potential of mechanical resonators in studying structural modifications in 2D materials and van der Waals heterostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Haonan Ling, Jacob B. Khurgin, Artur R. Davoyan
Summary: Layered van der Waals materials provide unique atomic-void channels with subnanometer dimensions, offering opportunities for advanced applications such as sensing and quantum information. Theoretical limits of light guiding in these channels show that materials with strong resonances, excitonic and polaritonic properties are ideal for deeply subwavelength light guiding. Transition metal dichalcogenides with excitonic properties can concentrate over 70% of optical power within them.
Article
Chemistry, Multidisciplinary
Muhammad A. K. Purbayanto, Madhurya Chandel, Magdalena Birowska, Andreas Rosenkranz, Agnieszka M. Jastrzebska
Summary: This article discusses the fundamental basis and recent findings in vertical vdW heterostructures composed of MXenes as a primary component and other 2D materials as secondary components. MXenes, with their rich surface chemistry and intriguing optical properties, offer a unique platform for optoelectronics applications. Coupling MXenes with other 2D materials in vdW heterostructures can provide new opportunities for exploring novel physical phenomena in quantum-confined nanostructures and devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wenkai Zhu, Hailong Lin, Faguang Yan, Ce Hu, Ziao Wang, Lixia Zhao, Yongcheng Deng, Zakhar R. Kudrynskyi, Tong Zhou, Zakhar D. Kovalyuk, Yuanhui Zheng, Amalia Patane, Igor Zutic, Shushen Li, Houzhi Zheng, Kaiyou Wang
Summary: This study reports all-2D van der Waals vertical spin-valve devices with two distinct transport behaviors and reveals the critical role of pinholes in the magnetoresistance of such devices.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kaifei Kang, Helmuth Berger, Kenji Watanabe, Takashi Taniguchi, Laszlo Forro, Jie Shan, Kin Fai Mak
Summary: Researchers have observed a thickness-driven 0-pi transition in Josephson junctions made of NbSe2 and Cr2Ge2Te6, and have also observed unusual supercurrent interference patterns near the critical thickness, indicating the formation of nanoscale domains in Cr2Ge2Te6.
Article
Chemistry, Physical
Jaeho Jeon, Haeju Choi, Sungpyo Baek, Seunghyuk Choi, Jeong Ho Cho, Sungjoo Lee
Summary: Research on ReS2/HfS2 and ReS2/h-BN vdW heterostructures has shown that direct growth of ReS2 films on HfS2 and h-BN can be achieved. The growth behavior is explained through a surface-dependent direct growth process, enabling symmetry-free growth of 2D vdW heterostructures.
APPLIED SURFACE SCIENCE
(2021)
Article
Zoology
Austin M. Garner, Alexandra M. Pamfilie, E. J. Hamad, Rachael Kindig, Joshua T. Taylor, Colleen K. Unsworth, Peter H. Niewiarowski
FRONTIERS IN ZOOLOGY
(2020)
Article
Anatomy & Morphology
Austin M. Garner, Michael C. Wilson, Caitlin Wright, Anthony P. Russell, Peter H. Niewiarowski, Ali Dhinojwala
Summary: This study compared the morphology of setae on the digits of Anolis lizards and geckos, finding significant differences in structure and arrangement. The length variation pattern of setae in Anolis was opposite to that in geckos, likely due to differences in adhesive peeling direction and biomechanical factors. Future research is needed to further validate these findings and explore the functional morphology of these convergent adhesive systems.
JOURNAL OF ANATOMY
(2021)
Article
Biology
Austin M. Garner, Alexandra M. Pamfilie, Ali Dhinojwala, Peter H. Niewiarowski
Summary: The study shows that captive geckos prefer substrates that elicit maximal adhesive performance. This suggests a correlation between adhesive performance and substrate preferences in captive geckos, with further research needed to test this hypothesis.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2021)
Article
Multidisciplinary Sciences
Saranshu Singla, Dharamdeep Jain, Chelsea M. Zoltowski, Sriharsha Voleti, Alyssa Y. Stark, Peter H. Niewiarowski, Ali Dhinojwala
Summary: This study identified the involvement of acid-base interactions between polar lipid head-groups on gecko setal surfaces and sapphire, and demonstrated the role of cohesive failure within the lipid layer in reducing setal wear during high stress sliding. Absence of the lipid layer was found to enhance adhesion, despite a small setal-substrate contact area. These results challenge the traditional view that gecko adhesion is solely based on vdW forces and is residue-free.
Article
Zoology
Bridget E. Ringenwald, Erin C. Bogacki, Carla A. Narvaez, Alyssa Y. Stark
Summary: The study found that gecko locomotor performance does not change with humidity or substrate wettability changes, unlike adhesive performance. Geckos ran significantly slower and stopped more frequently at 12 degrees Celsius compared to 32 degrees Celsius. At high temperatures, geckos required more running attempts on hydrophilic glass than plexiglass, indicating the treatment condition was unfavorable.
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2021)
Article
Evolutionary Biology
Austin M. Garner, Michael C. Wilson, Caitlin Wright, Anthony P. Russell, Peter H. Niewiarowski, Ali Dhinojwala
Summary: The subdigital adhesive pads of Caribbean Anolis lizards are a key innovation that allows them to occupy new ecological niches. Previous research has only focused on the macroscopic aspects of these pads, such as pad area, and has not examined the microstructure of the adhesive mechanism. This study found that lizards occupying higher perches have greater setal densities and smaller spatulae, which is consistent with the concept of contact splitting and suggests variation in adhesive performance. Microstructural evidence also suggests that biomechanics of adhesive locomotion may vary between different species of Anolis lizards.
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2022)
Article
Multidisciplinary Sciences
Amanda M. Palecek, Austin M. Garner, Mena R. Klittich, Alyssa Y. Stark, Jacob D. Scherger, Craig Bernard, Peter H. Niewiarowski, Ali Dhinojwala
Summary: The attachment of free-ranging geckos is influenced by the roughness and wettability of surfaces, as well as environmental conditions. Geckos show greater attachment in water than in air on smooth and rough hydrophobic surfaces, and their attachment to rough hydrophilic surfaces does not differ in air or water. Moreover, the study highlights the need for comprehensive surface characterization, as routine measurements may misrepresent the complexity of surface roughness.
SCIENTIFIC REPORTS
(2022)
Review
Biology
Glenna Clifton, Alyssa Y. Stark, Chen Li, Nicholas Gravish
Summary: Animals rarely encounter flat surfaces outside laboratory conditions and man-made structures. The roughness of natural substrates, which vary in scale, influences the locomotion of walking animals in various ways. Recent technical advances have expanded the opportunities to study animal movement on rough terrain, but there is a lack of consistent approach to quantify and contextualize these findings.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2023)
Article
Zoology
Alexandra M. Pamfilie, Austin M. Garner, Anthony P. Russell, Ali Dhinojwala, Peter H. Niewiarowski
Summary: Claws are important for prey capture, locomotion, and attachment in limbed amniotes. Previous studies have found correlations between claw morphology and habitat use, suggesting that claw shape varies to function effectively in different microhabitats. This study focused on the effect of claw shape on frictional interactions, and found that the diameter of the claw's tip is the most important predictor of friction, with narrower tips inducing greater friction on substrates that permit mechanical interlocking. Claw curvature, length, and depth also influence friction, but their effects depend on substrate surface roughness.
Article
Engineering, Multidisciplinary
Sarah J. McInerney, Peter H. Niewiarowski
Summary: Employees are critical to corporate sustainability, but sustaining their engagement is challenging. This study examines the psychological impact of biomimicry training on R&D employees and finds that it intrinsically motivates them and can be incorporated into their job duties. The study provides a procedural template for biomimicry training and highlights its potential to create positive change across various business units.
Meeting Abstract
Zoology
A. M. Pamfilie, A. M. Garner, A. P. Russell, A. Dhinojwala, P. H. Niewiarowski
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2021)
Meeting Abstract
Zoology
A. M. Garner, M. C. Wilson, C. Wright, A. P. Russell, A. Dhinojwala, P. H. Niewiarowski
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2021)
Meeting Abstract
Zoology
A. M. Garner, A. M. Pamfilie, A. Dhinojwala, P. H. Niewiarowski
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2021)
Meeting Abstract
Zoology
A. M. Pamfilie, A. M. Garner, P. H. Niewiarowski
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2020)