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Sweat is an important biofluid presents in the body since it regulates the internal body temperature, and it is relatively easy to access on the skin unlike other biofluids and contains several biomarkers that are also present in the blood. Although sweat sensing devices have recently displayed tremendous progress, most of the emerging devices primarily focus on the sensor development, integration...
Herein the effective electrical propulsion, cargo trapping, and transport capabilities of microbowl‐shaped Janus particles (JPs) are demonstrated and evaluated. These active JPs are made by deposition of Au and Ti layers onto sacrificial spherical polystyrene particles, followed by oxidation of the Ti to TiO2. In contrast to the commonly studied spherical JP, the dual broken symmetry of both geometrical...
In article number 2003678, Xiaolong Lu, Wenjuan Liu, and co‐workers report dandelion‐like microswarms assembled from tubular micromotors, which are capable of performing ultrafast growth and locomotion. With the ultrasound oscillation of self‐generated bubbles, such microswarms could move at an average speed of up to 50 mm s−1 and exhibit an instant and wireless response to ultrasound stimuli.
Dynamic assembly and cooperation represent future frontiers for next generations of advanced micro/nano robots, but the required local interaction and communication cannot be directly translated from macroscale robots through the minimization because of tremendous technological challenges. Here, an ultrafast growth and locomotion methodology is presented for dandelion‐like microswarms assembled from...
Virus‐like nanoparticles (VLPs) have been used as an attractive means in cancer immunotherapy because of their unique intrinsic immunostimulatory properties. However, for treating metastatic tumors in the peritoneal cavity, such as ovarian cancer, multiple injections of therapy are needed due to the large peritoneal space and fast excretion of therapy. Here, it is reported on the development of active...
Small‐scale actuators and propellers have benefited from advances in materials and manufacturing to become more lifelike. Inspired by animal species, multi‐generational chemically powered artificial propellers that carry small versions of themselves and deliver them “on‐the‐fly” are described. The released replicas are capable of autonomous propulsion and propelling immediately after detachment. Release...
Current technologies for managing acute and chronic pain have focused on reducing the time required for achieving high therapeutic efficiency. Herein a wearable transdermal patch is introduced, employing an acoustic droplet vaporization (ADV) methodology, as an effective noninvasive transdermal platform, for a fast local delivery of the anesthetic agent lidocaine. The skin‐worn patch consists of a...
Artificial micro/nanomotors that could perform diverse tasks autonomously at the micro/nanoscale have been emerging as promising tools in many practical applications. Electrochemical synthesis is one of the dominating methods to fabricate these micro/nanodevices with diverse geometries and material components. By changing the conditions of electrochemical deposition, the surface morphology, crystal...
Artificial micro/nanomotors that could perform diverse tasks autonomously at the micro/nano scale hold great promise in environmental remediation applications. In article number 1802771, Wenjuan Liu, Xiaolong Lu, Jinxing Li, Joseph Wang, and co‐workers synthesize highly efficient tubular poly(3,4‐ethylenedioxythiophene)/MnO2 micromotors via potentiostatic deposition to obtain unique ramsdellite structures...
This work describes a flexible and stretchable battery pack configuration that exhibits highly stable performance under large deformation up to 100% biaxial stretching. Using stress‐enduring printable inks and serpentine interconnects, the new screen‐printing route offers an attractive solution for converting rigid battery units into a flexible, stretchable energy storage device. Coin‐cell lithium...
The new capabilities and functionalities of synthetic micro/nanomotors open up considerable opportunities for diverse environmental and biomedical applications. Water‐powered micromachines are particularly attractive for realizing many of these applications. Magnesium‐based motors directly use water as fuel to generate hydrogen bubbles for their propulsion, eliminating the requirement of common toxic...
All‐in‐one material for microrocket propulsion featuring acid‐based bubble generation and magnetic guidance is presented. Electrochemically deposited iron serves as both a propellant, toward highly efficient self‐propulsion in acidic environments, and as a magnetic component enabling complete motion control. The new microrockets display longer lifetime and higher propulsion efficiency compared to...
A highly efficient body‐deformable nanoswimmer that emulates the body and caudal fin propulsion of fish swimming is developed by L. Li, J. Wang, and co‐workers on page 6098. The undulatory motion of the nanofish under an oscillating magnetic field allows it to propel in low Reynolds number fluid environments. The new fish‐like deformable nanoswimmer holds considerable promise for practical applications,...
The swimming locomotion of fish involves a complex interplay between a deformable body and induced flow in the surrounding fluid. While innovative robotic devices, inspired by physicomechanical designs evolved in fish, have been created for underwater propulsion of large swimmers, scaling such powerful locomotion into micro‐/nanoscale propulsion remains challenging. Here, a magnetically propelled...
T. Si, Q. He, and co‐workers demonstrate the fuel‐free, highly efficient propulsion of gold nanoshell‐functionalized polymeric multilayer rockets under NIR illumination. On page 577, the NIR‐driven rockets, fabricated by nanoporous template‐assisted polyelectrolyte layer‐by‐layer assembly, can move at a speed of 160 μm s−1 owing to the self‐thermophoretic forces generated by the photothermal effect...
A gold nanoshell‐functionalized polymer multilayer nanorocket performs self‐propulsion upon the irradiation with NIR light in the absence of chemical fuel. Theoretical simulations reveal that the NIR light‐triggered self‐thermophoresis drives the propulsion of the nanorocket. The nanorocket also displays efficient NIR light‐triggered propulsion in biofluids and thus holds considerable promise for...
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