The smallest man‐made jet engine

Sánchez, Samuel; Solovev, Alexander A.; Harazim, Stefan M.; Deneke, Christoph; Mei, Yong; Schmidt, Oliver G.

doi:10.1002/tcr.201100010

Cited by 44 publications

(51 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using molecular beam epitaxy (MBE), thin films of InGaAs/GaAs were deposited on sacrificial AlAs layers and bulk GaAs substrate, and a thin catalytic Pt film sputtered on top. [31] By rolling up those nanomembranes, we fabricated catalytic nanotubes with diameters approximately 20 times smaller than previously reported rolled-up microjets and half the size of the recently designed nanojets. Consequently, we reported the smallest man-made catalytic jet engines.…”

Section: Catalytic Nanojets Drilling Into Fixed Cellsmentioning

confidence: 98%

See 1 more Smart Citation

Tubular Micro-nanorobots: Smart Design for Bio-related Applications

Sánchez

Solovev

et al. 2014

Lecture Notes in Computer Science

Self Cite

View full text Add to dashboard Cite

Abstract. We designed microrobots in the form of autonomous and remotely guided microtubes. One of the challenges at small scales is the effective conversion of energy into mechanical force to overcome the high viscosity of the fluid at low Reynolds numbers. This can be achieved by integration of catalytic nano-materials and processes to decompose chemical fuels. However, up to now, mostly hydrogen peroxide has been employed as a fuel which renders the potential applications in biomedicine and in vivo experiments. Therefore, other sources of energy to achieve motion at the micro-nanoscale are highly sought-after. Here, we present different types of tubular micro-and nanorobots, alternative approaches to toxic fuels and also, steps towards the use of tubular microrobots as micro-and nanotools.

show abstract

Section: Catalytic Nanojets Drilling Into Fixed Cellsmentioning

confidence: 98%

“…Consequently, we reported the smallest man-made catalytic jet engines. [31] The catalytic nanojets are powered by the decomposition of H 2 O 2 into molecular oxygen, which accumulates in microcavity and eventually gets released from one end of the nanotube as visible micro-bubbles (Fig. 1).…”

Section: Catalytic Nanojets Drilling Into Fixed Cellsmentioning

confidence: 99%

Tubular Micro-nanorobots: Smart Design for Bio-related Applications

Sánchez

Solovev

et al. 2014

Lecture Notes in Computer Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Panel A reprinted with permission from ref (39). Copyright 2016 John Wiley and Sons, Inc. Panel C reprinted with permission from ref (24). Copyright 2011 John Wiley and Sons, Inc. Panel D reprinted with permission from ref (20).…”

Section: Tubular Bubble Propelled Microjetsmentioning

confidence: 99%

Designing Micro- and Nanoswimmers for Specific Applications

et al. 2016

View full text Add to dashboard Cite

ConspectusSelf-propelled colloids have emerged as a new class of active matter over the past decade. These are micrometer sized colloidal objects that transduce free energy from their surroundings and convert it to directed motion. The self-propelled colloids are in many ways, the synthetic analogues of biological self-propelled units such as algae or bacteria. Although they are propelled by very different mechanisms, biological swimmers are typically powered by flagellar motion and synthetic swimmers are driven by local chemical reactions, they share a number of common features with respect to swimming behavior. They exhibit run-and-tumble like behavior, are responsive to environmental stimuli, and can even chemically interact with nearby swimmers. An understanding of self-propelled colloids could help us in understanding the complex behaviors that emerge in populations of natural microswimmers. Self-propelled colloids also offer some advantages over natural microswimmers, since the surface properties, propulsion mechanisms, and particle geometry can all be easily modified to meet specific needs.From a more practical perspective, a number of applications, ranging from environmental remediation to targeted drug delivery, have been envisioned for these systems. These applications rely on the basic functionalities of self-propelled colloids: directional motion, sensing of the local environment, and the ability to respond to external signals. Owing to the vastly different nature of each of these applications, it becomes necessary to optimize the design choices in these colloids. There has been a significant effort to develop a range of synthetic self-propelled colloids to meet the specific conditions required for different processes. Tubular self-propelled colloids, for example, are ideal for decontamination processes, owing to their bubble propulsion mechanism, which enhances mixing in systems, but are incompatible with biological systems due to the toxic propulsion fuel and the generation of oxygen bubbles. Spherical swimmers serve as model systems to understand the fundamental aspects of the propulsion mechanism, collective behavior, response to external stimuli, etc. They are also typically the choice of shape at the nanoscale due to their ease of fabrication. More recently biohybrid swimmers have also been developed which attempt to retain the advantages of synthetic colloids while deriving their propulsion from biological swimmers such as sperm and bacteria, offering the means for biocompatible swimming. In this Account, we will summarize our effort and those of other groups, in the design and development of self-propelled colloids of different structural properties and powered by different propulsion mechanisms. We will also briefly address the applications that have been proposed and, to some extent, demonstrated for these swimmer designs.

show abstract

“…Important expectations and the visions of nanotechnology pioneers are hardly fulfilled by the technological progress of the last decades. This concerns, for example, the shrinking of machines to nanodimensions [6][7][8][9][10][11][12], the substitution of planar technology with threedimensional architectures [13][14][15], the development of autonomous-acting nanorobots [16][17][18], or a technical approach for "artificial life" [19][20][21][22][23]. In particular, the comparison with the construction principles and functions of nanosystems in living nature teaches us how far our technical products are away from the level of the machine-like micro-and nanostructures generated by biomolecular mechanisms [24,25].…”

Section: Introductionmentioning

confidence: 98%

What are proteins teaching us on fundamental strategies for molecular nanotechnology?

Koehler

2015

Nanotechnology Reviews

View full text Add to dashboard Cite

Besides the fundamental competition between the top-down and bottom-up approaches in nanotechnology, there are some basic aspects for organizing structures and functions at the molecular level. The recent challenges to the development of nanotechnology are marked by a group of general requirements: selection of suited building units, overcoming the restrictions of planar technology, shrinking of nanofabrication facilities, sustainable production and management of life cycles, organization of autonomy and communication at the nano-level, and the optimization of power consumption and energy management. Looking at the natural principles in the construction, synthesis, and function of proteins helps in understanding the principal differences between the currently applied technologies and the characteristics of biomolecular mechanisms in cells. This view allows formulating seven basic rules to meet the general requirements for future developments in molecular nanotechnology.

show abstract

The smallest man‐made jet engine

Cited by 44 publications

References 27 publications

Tubular Micro-nanorobots: Smart Design for Bio-related Applications

Tubular Micro-nanorobots: Smart Design for Bio-related Applications

Designing Micro- and Nanoswimmers for Specific Applications

What are proteins teaching us on fundamental strategies for molecular nanotechnology?

Contact Info

Product

Resources

About