Results 211 to 220 of about 517,702 (295)

Mapping of Physiological Signals From Wireless Battery‐Free Implants With Plane‐Wave Ultrasound Imaging

Advanced Materials Technologies, EarlyView.
Combined approach of electromagnetic (Power) and ultrasound (data harvesting) waves is proposed to address the miniaturized ultrasonic implants. Electromagnetic waves trigger the piezoelectric element to generate the acoustic pulse which is modulated by the variations in the sensor's impedance.
Anam Bhatti, Hugo Guillot, Ouafae Firdaouissi, Mohammed Irar, Lionel Rousseau, Clément Hébert, Maxime Lafond   +6 more
wiley   +1 more source

Novel Filter-Based Excitation Method for Pulse Compression in Ultrasonic Sensory Systems. [PDF]

Sensors (Basel)
Cortés Á, Pérez-Rubio MC, Hernández Á.   +2 more
europepmc   +1 more source

Bay‐functionalized [7]Helicene Bilayer Nanographenes

Advanced Optical Materials, EarlyView.
Bay‐functionalized [7]helical bilayer nanographenes are synthesized via a scalable, modular strategy enabling late‐stage diversification. Tailored methoxy, diketone, and phenazine substitutions precisely tune redox, photophysical, and chiroptical properties, delivering strong electronic circular dichroism and bright circularly polarized luminescence ...
Anmol Thanai, Vikas Sharma, Louis Minion, Hassan Khan, Hadeel Abbas, George F. S. Whitehead, Avantika Hasija, Jessica Wade, Matthew John Fuchter, Ashok Keerthi   +9 more
wiley   +1 more source

Internet of Things Node with Real-Time LoRa GEO Satellite Connectivity for Agrifood Chain Tracking in Remote Areas. [PDF]

Sensors (Basel)
Giannetti G, Badii M, Lasagni G, Maddio S, Collodi G, Righini M, Cidronali A.   +6 more
europepmc   +1 more source

Quasi‐Single‐Mode Polaritonic Crystal for Hyperbolic Phonon‐Polaritons

Advanced Optical Materials, EarlyView.
Near‐field study of the polaritonic Fourier crystal with α‐MoO3 reveals that the hyperbolic phonon‐polaritons within the Type‐I Reststrahlen band may form a quasi‐single‐mode Bloch wave where only the fundamental mode propagates in the crystal. Our results demonstrate the realization of a quasi‐single‐mode regime for the inherently multimode hyperbolic
Sergey G. Menabde, Yongjun Lim, Alexey Y. Nikitin, Pablo Alonso‐González, Jacob T. Heiden, Heerin Noh, Seungwoo Lee, Min Seok Jang   +7 more
wiley   +1 more source

Ultrabroadband, achromatic, and non-diffracting perfect optical vortex generation via radial momentum control in dielectric metasurfaces. [PDF]

Nat Commun
Xia T, Xie Z, Zhang Q, Xiao W, Yang H, Hu Y, Duan H, Cai Y, Yuan X.   +8 more
europepmc   +1 more source

Substituent Effects on Cyanine Dyes Vary with Position and Chain Length

Advanced Optical Materials, EarlyView.
In cyanines, substituent effects vary as a function of substituent position and cyanine length. Electron‐donating‐ and ‐withdrawing groups at meso‐ and α‐positions of 4n+1/4n−1 long cyanines (n = 1, 2, 3…) cause opposing, hypsochromic and bathochromic shifts of the 1st UV–vis absorption bands.
David Dunlop, Rebecca Strada, Peter Šebej   +2 more
wiley   +1 more source

Electromagnetic situation awareness and modeling for space-air-ground integrated networks. [PDF]

Natl Sci Rev
An J, Tao Y, Zhang X, Hua Z, Wang S, Pan G, Yang X, Niyato D, Karagiannidis GK.   +8 more
europepmc   +1 more source

Highly Efficient Pure‐Blue Single‐Layer Organic Light‐Emitting Diodes Without High‐Triplet‐Energy Auxiliary Materials

Advanced Optical Materials, EarlyView.
Blue organic light‐emitting diodes (OLEDs) comprising triplet‐harvesting emitters require the use of high‐triplet‐energy hosts and blocking layers to confine the triplet excitons to the emitter. Here, we present efficient single‐layer blue hyperfluorescent OLEDs comprising solely of a matrix‐free emissive layer between two charge‐injecting electrodes ...
Xiao Tan, Manish Kumar, Oskar Sachnik, Rishabh Saxena, Paul W. M. Blom, Gert‐Jan A. H. Wetzelaer   +5 more
wiley   +1 more source

Experimental Evaluation of LR-FHSS: A Comparison with LoRa. [PDF]

Sensors (Basel)
Sanchez-Vital R, Casals L, Jara-Ortínez B, Bodvanski J, Vidal R, Garcia-Villegas E, Gomez C.   +6 more
europepmc   +1 more source