Article
Chemistry, Multidisciplinary
Jiang-Xing Chen, Renbo Yuan, Rufei Cui, Liyan Qiao
Summary: The study investigates the dynamics of chemically powered sphere dimers at the micro- and nano-scales in a quasi-two-dimensional geometry. It is found that the asymmetric concentration gradients generated by a chemical reaction on the catalytic surface lead to self-propulsion of the dimers, forming anti-parallel aligned doublets that exhibit the same rotation direction and lose translational motion. The chirality of the dimers plays a crucial role in the formation of these doublets, displaying new collective dynamics and structures when both translational and rotational self-propulsion occur simultaneously.
Article
Chemistry, Multidisciplinary
Ambika Somasundar, Ayusman Sen
Summary: The development of nano and micromotors for actively delivering drugs to disease sites in vivo faces challenges such as safety, biocompatibility, ability to traverse body fluids, and reach cellular targets. Furthermore, scalability and uniformity in production are critical factors.
Article
Chemistry, Physical
Rajiblochan Sahoo, Ligesh Theeyancheri, Rajarshi Chakrabarti
Summary: This study computationally investigates the transport of an active tracer through a polymer grafted cylindrical channel. The results show that passive tracers exhibit subdiffusion with increasing stickiness, while repulsive tracers prefer to diffuse through pore-like space along the channel axis. In contrast, active tracers show faster dynamics and intermediate superdiffusion, despite staying close to the dense polymeric region.
Article
Physics, Multidisciplinary
Jiyuan Wang, Mu-Jie Huang, Remmi D. Baker-Sediako, Raymond Kapral, Igor S. Aranson
Summary: The presence of a constraining environment affects the behavior of self-propelled synthetic microswimmers, and their collective behavior is determined by various factors such as thermal fluctuations, hydrodynamic and electrostatic interactions, chemical reactions, and gravity. Controlling the individual and collective behavior of self-propelled synthetic micro-objects has significant applications in nanotechnology, robotics, and precision medicine.
COMMUNICATIONS PHYSICS
(2022)
Article
Chemistry, Physical
He-Ting Huang, Ru-Fei Cui, Jian-Long Kou, Zheng-Cheng Wen, Jiang-Xing Chen
Summary: The dynamics of self-propelled micro-motors in a thin fluid film with an attractive substrate are studied using particle-based simulation. A chemically powered sphere dimer can be captured by a trap on the substrate and form various configurations. Small traps on the substrate can pin the dimers, reducing their diffusion coefficient.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Anirban Mondal, Ryojun Toyoda, Romain Costil, Ben L. Feringa
Summary: This article summarizes the design, synthesis, and dynamic properties of molecular machines, and presents methods for controlled switching or rotation of different classes of atropisomers under chemical stimulus, categorizing them as molecular switches, rotors, motors, and autonomous motors. Future perspectives and challenges for building sophisticated molecular machines are also provided.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yutaro Machida, Yudai Tanaka, Yuya Masuda, Aya Kimura, Tsuneomi Kawasaki
Summary: In the pursuit of a credible mechanism for the abiotic synthesis of a-amino acids, solid-state asymmetric Strecker/retro-Strecker reactions have been demonstrated to produce enantioenriched aminonitriles through asymmetric addition of cyanide to enantiomorphic crystals of achiral imines. Moreover, dehydrocyanation of enantioenriched aminonitriles yielded chiral crystals of achiral imines stereoselectively, indicating a stereoinversion of the synthetic intermediates. The reversible Strecker reaction is expected to be a focus of research on the origin of chirality.
Article
Nanoscience & Nanotechnology
Le Zhou, Yi Wei, Qian Zhao, Hao Fu, Hongwen Zhang, Weiping Cai, Zhipeng Zhao, Yujing Guo, Shuyi Zhu
Summary: This study design and fabricate Pt-TiO2 bilayered hemispherical nanoshells with different Pt distributions, and discover their Pt distribution-dependent motion modes and speeds in H2O2-containing solutions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Organic
Shu-Qin Qin, Wei Xu, Qi-Qi Wang, Run-Yi Chen, De-Zhi Yang, Yang Lu, Wen-Cai Ye, Ren-Wang Jiang
Summary: A novel tetracationic macrocycle was synthesized and used as a cation for recognizing specific anions, leading to the formation of a unique supramolecular assembly. The binding affinity between the cation and anions was characterized, and the assembly showed selectivity towards cytosine. This study provides a new method for efficient recognition of cytosine and separation of antifungal drugs.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Takahiko Ban, Kohei Matsumoto, Ben Nanzai, Yasushige Mori, Hideki Nabika
Summary: This study systematically varied the wettability of a surfactant-adsorbed solid surface by adjusting the pH of the surrounding fluid and quantitatively investigated the relationship between bifurcation and the spreading coefficient that determines the disjoining pressure. The size-dependent droplet velocity is consistent with a model considering the kinetic factors of relevant chemical reactions. Bifurcation occurred when the sign of the thermodynamically determined dispersive component of the spreading coefficient changed, indicating a change in the direction of the disjoining pressure.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Review
Chemistry, Multidisciplinary
Jinhua Li, Carmen C. Mayorga-Martinez, Claus-Dieter Ohl, Martin Pumera
Summary: This review provides a comprehensive overview of the applications of ultrasound in driving micro- and nanorobots, including theory, design, fabrication methods, propulsion mechanisms, and hybrid motion with other driving methods. It highlights the potential applications of ultrasound-powered micro/nanorobots in various fields and offers a future outlook on the development of ultrasound-driven micro/nanorobots.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Cell Biology
Jae-Hyun Yang, Christopher A. Petty, Thomas Dixon-McDougall, Maria Vina Lopez, Alexander Tyshkovskiy, Sun Maybury-Lewis, Xiao Tian, Nabilah Ibrahim, Zhili Chen, Patrick T. Griffin, Matthew Arnold, Jien Li, Oswaldo A. Martinez, Alexander Behn, Ryan Rogers-Hammond, Suzanne Angeli, Vadim N. Gladyshev, David A. Sinclair
Summary: A hallmark of eukaryotic aging is a loss of epigenetic information, a process that can be reversed. By ectopically inducing the Yamanaka factors OCT4, SOX2, and KLF4 (OSK) in mammals, we can restore youthful characteristics without changing cellular identity. Through high-throughput cell-based assays, we have identified six chemical cocktails that can reverse cellular aging and rejuvenate human cells without altering the genome.
Article
Astronomy & Astrophysics
M. Leemker, M. L. R. van 't Hoff, L. Trapman, M. L. van Gelder, M. R. Hogerheijde, D. Ruiz-Rodriguez, E. F. van Dishoeck
Summary: The research investigates the tracing of the water snowline in protoplanetary disks using HCO+ and (HCO+)-C-13 as potential tracers, but highlights challenges in observing and confirming the water snowline's location.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Chemistry, Physical
Ryo Kato, Takayuki Umakoshi, Prabhat Verma
Summary: This study demonstrates the nanoscale visualization of optical field distribution and wavelength dependence of localized surface plasmon resonance of gold nanostructures using a TERS-based technique. The results enable a comprehensive understanding of the inherent plasmonic properties of metallic nanostructures, aiding in the development of various plasmonic applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Review
Biochemistry & Molecular Biology
Yaning Gao, Chenchen Gao, Yirong Fan, Hui Sun, Jianzhong Du
Summary: This Review highlights the recent advances in the design principles, synthetic strategies, and biomedical applications of multicompartment polymersomes (MCPs). Different compartmentalization types and synthesis methods are discussed. Moreover, the diverse applications of MCPs in various fields are emphasized. Future perspectives for controlled synthesis and applications of MCPs are proposed.
Article
Chemistry, Multidisciplinary
Benjamin M. Tansi, Matthew L. Peris, Oleg E. Shklyaev, Anna C. Balazs, Ayusman Sen
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Multidisciplinary Sciences
Allan M. Brooks, Mykola Tasinkevych, Syeda Sabrina, Darrell Velegol, Ayusman Sen, Kyle J. M. Bishop
NATURE COMMUNICATIONS
(2019)
Article
Multidisciplinary Sciences
Arunima Sen, Tobias Himmler, Wei Li Hong, Cheshtaa Chitkara, Raymond W. Lee, Benedicte Ferre, Aivo Lepland, Jochen Knies
SCIENTIFIC REPORTS
(2019)
Article
Nanoscience & Nanotechnology
Raj Kumar Manna, Oleg E. Shklyaev, Joshua Kauffman, Benjamin Tansi, Ayusman Sen, Anna C. Balazs
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Multidisciplinary Sciences
Arunima Sen, Cheshtaa Chitkara, Wei-Li Hong, Aivo Lepland, Sabine Cochrane, Rolando di Primio, Harald Brunstad
Article
Engineering, Chemical
Teng Li, Ping Jin, Yekai Zhang, Kexin Huang, Jingen Long, Jun Jiang, Shengqin Liu, Ayusman Sen, Weiran Yang
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Ecology
Arunima Sen, Alena Didriksen, Stephane Hourdez, Mette Marianne Svenning, Tine L. Rasmussen
ECOLOGY AND EVOLUTION
(2020)
Article
Geosciences, Multidisciplinary
Wei-Li Hong, Pauline Latour, Simone Sauer, Arunima Sen, William P. Gilhooly, Aivo Lepland, Fotios Fouskas
GEO-MARINE LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Kayla Gentile, Subhabrata Maiti, Allison Brink, Bhargav Rallabandi, Howard A. Stone, Ayusman Sen
Article
Chemistry, Multidisciplinary
Joshua E. Kauffman, Abhrajit Laskar, Oleg E. Shklyaev, Anna C. Balazs, Ayusman Sen
Review
Environmental Sciences
Emmelie K. L. Astrom, Arunima Sen, Michael L. Carroll, JoLynn Carroll
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Kayla Gentile, Ambika Somasundar, Ashlesha Bhide, Ayusman Sen
Article
Chemistry, Multidisciplinary
Ambika Somasundar, Ayusman Sen
Summary: The development of nano and micromotors for actively delivering drugs to disease sites in vivo faces challenges such as safety, biocompatibility, ability to traverse body fluids, and reach cellular targets. Furthermore, scalability and uniformity in production are critical factors.
Article
Environmental Sciences
Ting Xu, Yanan Sun, Zhi Wang, Arunima Sen, Pei-Yuan Qian, Jian-Wen Qiu
Summary: Sclerolinum annulatus n. sp. is a newly described species of Siboglinidae found in the Haima cold seep of the South China Sea. It is morphologically distinct with transverse rings and elongated plaques on both sides of the dorsal furrow. Genetic analysis supports its placement in the genus Sclerolinum with a close relationship to an undescribed siboglinid from Japan.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Arunima Sen, Liselotte W. Andersen, Kasper U. Kjeldsen, Loic N. Michel, Wei Li Hong, Marvin Choquet, Tine L. Rasmussen
Summary: We used ancient DNA extraction methods to confirm the genetic identity of a polychaete species that has been a matter of debate since its description. Our results revealed a high genetic match with a cryptic seep species. Additionally, we found that chemosynthesis-based polychaetes in Arctic seeps are not seep specialists and may have a relatively generalist habitat. Our findings suggest that Arctic chemosymbiotic animals seasonally vary their reliance on chemosynthetic partners due to the extreme seasonality of the Arctic.