Results 121 to 130 of about 644,059 (323)

Designing Physical Unclonable Functions From Optically Active Materials

Advanced Materials, EarlyView.
Assigning unforgeable “fingerprints” to manufactured goods is a key strategy to fight global counterfeiting. Optical physical unclonable functions (PUFs) are chemically generated random patterns of optically active materials serving as unique authenticators.
Maxime Klausen, Junfang Zhang, Molly M. Stevens   +2 more
wiley   +1 more source

Development of a line module type of SiC deformable mirror

International Journal of Optomechatronics
In this work, the complete development of a line module type silicon carbide (SiC) deformable mirror (DM) for adaptive optics (AO) is described. To eliminate the risk of fracture and misalignment during the simultaneous assembly of all actuators and the ...
Pilseong Kang, Youngsoo Kim, Eui-Seung Son, Kihun Lee, Jaehyun Lee, Hyug-Gyo Rhee   +5 more
doaj   +1 more source

Ultrafast Light‐Driven Electronic and Structural Changes in LaFeO3 Perovskites Probed by Femtosecond X‐Ray Absorption Spectroscopy

Advanced Materials, EarlyView.
Femtosecond X‐ray absorption spectroscopy (fs‐XAS) at PAL‐XFEL captures ultrafast electronic and structural dynamics in epitaxial LaFeO3 thin films. Combined with DFT and multiplet calculations, the study reveals photoinduced ligand‐to‐metal charge transfer, followed by polaron formation and reduced oxygen 2p‐iron 3d hybridization, explaining key ...
Masoud Lazemi, Fabian J. Mohammad, Sang Han Park, Abhishek Katoch, Hans J.F.A. Blankesteijn, Andrés R. Botello‐Méndez, Emma van der Minne, Yorick A. Birkhölzer, Iris C. G. van den Bosch, Ellen M. Kiens, Christoph Baeumer, Gertjan Koster, Soonnam Kwon, Uwe Bergmann, Frank M. F. de Groot   +14 more
wiley   +1 more source

Dynamic response of ferrofluidic deformable mirrors using elastomer membrane and overdrive techniques

International Journal of Optomechatronics, 2018
The experimental results obtained with a ferrofluidic deformable mirror controlled by electro-magnet actuators are presented here. Using a step input through a single actuator, we obtained a steady-state settling time of 100 ms; however, different ...
Maxime Rochette, Ermanno F. Borra, Jean-Philippe Déry, Anna M. Ritcey   +3 more
doaj   +1 more source

Light‐Fueled In‐Operando Shape Reconfiguration, Fixation, and Recovery of Magnetically Actuated Microtextured Covalent Adaptable Networks

Advanced Materials, EarlyView.
A covalent adaptable network with dynamic disulfide bonds (DS‐CAN) can rearrange its molecular topology through heating or UV irradiation. When combined with ferromagnetic particles, its photoresponsiveness at room temperature enables contactless, spatiotemporal regulation of dynamic bond exchanges during magnetomechanical actuation.
Yeomyung Yoon, Hojun Moon, Woongbi Cho, Dongwook Lee, Sohdam Jeong, Jeong Jae Wie, Chae Bin Kim   +6 more
wiley   +1 more source

Capillary‐Driven 3D Open Fluidic Networks for Versatile Continuous Flow Manipulation

Advanced Materials, EarlyView.
The capillary‐driven 3D open fluidic networks (OFNs), composed of connected polyhedral frames, enable precise, programmable, and versatile manipulation of unary, binary, and multiple continuous flows in both spatial and temporal dimensions. OFNs represent a significant leap beyond conventional microfluidics, unlocking new possibilities for selective ...
Shuangmei Wu, Siqi Sun, Jia Ye, Liqiu Wang, Yiyuan Zhang   +4 more
wiley   +1 more source

Bioinspired, Rapidly Responsive Magnetically Tunable Stiffness Metamaterials

Advanced Materials, EarlyView.
A 3D array of magnetoactive mechanical metamaterials enables rapid and reversible stiffness modulation under external magnetic fields. By adjusting field direction and intensity, the system exhibits diverse deformation modes and tunable modulus. This fast‐responding mechanical metamaterial offers real‐time adaptability for advanced reconfigurable and ...
Gooyoon Chung, Huy Le Quang, Jung Hyun Kim, Jeongmin Yoo, Seung Kwon Seol, Yoonseok Park   +5 more
wiley   +1 more source

A Cooled Deformable Bimorph Mirror for a High Power Laser [PDF]

, 2006
Jun Ho Lee, Young Cheol Lee, Eung Cheol Kang   +2 more
openalex   +1 more source

P3HT‐Based Electroactive Films for In Vitro Neuronal Cell Interfacing

Advanced Materials Interfaces, EarlyView.
Reducing the mechanical mismatch between bioelectronic devices and tissue is crucial for enhancing the characteristics of biointerfaces that better mimic the biological tissues. This work investigates the physico‐chemical properties of tunable nanostructured surfaces obtained from a blend of P3HT and MWCNT electroactive polymer.
Paola Campione, Claudia Latte Bovio, Giovanna Calabrese, Francesca Santoro, Grazia Maria Lucia Messina   +4 more
wiley   +1 more source

Wide‐Field Bond Quality Evaluation Using Frequency Domain Thermoreflectance with Deep Neural Network Feature Reconstruction

Advanced Materials Interfaces, EarlyView.
In this work, wide‐field (>1 mm2) frequency‐domain thermoreflectance (FDTR) hyperspectral imaging is used to image subsurface indium bump bonds 50 µm below the surface. Thermal analysis with Monte Carlo uncertainty propagation is used to evaluate bump quality, while a trained deep neural network (can rapidly reconstruct bump geometry contact area maps.
Amun Jarzembski, Siddharth Nair, Wyatt Hodges, Matthew Jordan, Anthony McDonald, Logan Antiporda, Greg W. Pickrell, Timothy Walsh, Fabio Semperlotti, Jason Neely, Luke Yates   +10 more
wiley   +1 more source