Results 71 to 80 of about 21,803 (297)

A feasibility study on using inkjet technology, micropumps, and MEMs as fuel injectors for bipropellant rocket engines

, 2008
Control over drop size distributions, injection rates, and geometrical distribution of fuel and oxidizer sprays in bi-propellant rocket engines has the potential to produce more efficient, more stable, less polluting rocket engines.
Bramanti, Cristina, Coletti, Michele, Gabriel, Stephen, Glynne-Jones, Peter, White, Neil M.   +4 more
core   +1 more source

Swelling‐Programmed Topographical Guidance for Dynamic Spheroid Self‐Assembly via a Mechanochemical Hydrogel Niche

Advanced Functional Materials, EarlyView.
A swelling‐programmed micropatterned hydrogel guides adherent cells through a controlled transition from cell–matrix anchoring to cadherin‐mediated cell–cell compaction, enabling rapid assembly of high‐viability spheroids with defined size and morphology.
Han Gyeol Nam, Seon Yeong Chae, Young Woo Kwon, Hye Jin Heo, Hye Rin Lee, Ji Hyeok Lee, Dong‐Wook Han, Yun Hak Kim, Suck Won Hong   +8 more
wiley   +1 more source

Electrostatic curved electrode actuators [PDF]

Proceedings IEEE Micro Electro Mechanical Systems. 1995, 2005
In this paper, the design, fabrication, and first experimental results of electrostatic curved electrode actuators are addressed. The actuator design is based upon the deformation of a movable micromechanical structure by electrostatic forces using a fixed curved electrode.
Legtenberg, R., Berenschot, Johan W., Elwenspoek, Michael Curt, Fluitman, J.H.J.   +3 more
openaire   +3 more sources

Nanodiamond Quantum Sensors for Probing Free Radical Biology

Advanced Functional Materials, EarlyView.
Free radicals play key roles in cellular signaling and disease but remain difficult to measure in living systems. Nanodiamonds (NDs) with nitrogen‐vacancy (NV) centers enable quantum sensing of local magnetic noise via T₁ relaxometry, providing nondestructive radical detection in living cells.
Qi Lu, Yingke Wu, Tanja Weil
wiley   +1 more source

Fabrication of an active nanostencil with integrated microshutters [PDF]

, 2003
An active nanostencil, consisting of a thin (200 nm) silicon nitride membrane with attached polysilicon microactuators that can be used to dynamically open and/or close holes in the silicon nitride membrane, is presented.
Berenschot, J.W., Brugger, J., Egger, S., Ekkels, P., Krijnen, G.J.M., Ma, K.C., Tjerkstra, R.W.   +6 more
core   +2 more sources

Optomechanical zipper cavity lasers: theoretical analysis of tuning range and stability [PDF]

, 2009
The design of highly wavelength tunable semiconductor laser structures is presented. The system is based on a one dimensional photonic crystal cavity consisting of two patterned, doubly-clamped nanobeams, otherwise known as a "zipper" cavity.
Björk, Bruce, Camacho, Chan, Coldren, Day, Diehl, Eichenfield, Eichenfield, Hard, Haus, Hill, Huang, Hwang, Johnson, Kippenberg, Kippenberg, Kitamura, Lee, Lin, Liu, Liu, Liu, Maboudian, Matsui, Moreau, Oskar Painter, Perahia, Raviv Perahia, Rice, Rosenberg, Seo, Sillanpaa, Slusher, Srinivasan, Srinivasan, Stintz, Tas, Thiago P. Mayer Alegre   +38 more
core   +2 more sources

Multi‐Scale Interface Engineering of MXenes for Multifunctional Sensory Systems

Advanced Functional Materials, EarlyView.
MXenes, as two‐dimensional transition metal carbides and nitrides, demonstrate remarkable capabilities for multifunctional sensing applications. This review systematically examines multi‐scale interface engineering approaches that enhance sensing performance, enable diverse detection functionalities, and improve system‐level compatibility in MXene ...
Jiaying Liao, Sin‐Yi Pang, Jianhua Hao
wiley   +1 more source

High frequency pressure oscillator for microcryocoolers [PDF]

, 2008
Microminiature pulse tube cryocoolers should operate at a frequency of an order higher than the conventional macro ones because the pulse tube cryocooler operating frequency scales inversely with the square of the pulse tube diameter.
H. J. Holland, H. J. M. ter Brake, H. V. Jansen, J. F. Burger, Jhabvala M., Lerou P. P. P. M., M. C. Elwenspoek, Marquardt E. D., Radebaugh R., S. Vanapalli, Timoshenko S. P., Y. Zhao   +11 more
core   +2 more sources

Dual‐Programmable Architected Magnetic Soft Materials: Tuning Mechano–Electric Responses by Inverse Design

Advanced Functional Materials, EarlyView.
ABSTRACT Materials that can deform, sense, and autonomously generate power in response to wireless magnetic fields, through both magnetic‐actuated shape transformation and charge generation, are an emerging focus in advanced functional materials research.
Zhi Zhao, Xiaojia Shelly Zhang
wiley   +1 more source

MEMS-actuated wavelength drop filter based on microsphere whispering gallery modes [PDF]

, 2011
MEMS-enabled tuneable optical coupling between optical microsphere resonators and optical fibre waveguides is reported. We describe the design, fabrication and experimental characterization of a MEMS platform, based on electrothermal actuators, which ...
Blue, Robert, Flockhart, Gordon M H, Li, Li, Uttamchandani, Deepak   +3 more
core   +1 more source