Results 61 to 70 of about 21,993 (294)

Airborne ultrasound pulse amplification based on acoustic resonance switching

Scientific Reports, 2022
Airborne ultrasound radiation pressure, a nonlinear effect that appears as a static force in mid-air in the presence of strong ultrasound, has recently been applied in novel scientific and industrial fields.
Yuki Hashimoto, Yasuaki Monnai
doaj   +1 more source

AccuVein® fails to facilitate venous marking for saphenous veins harvesting in untrained students

Vascular Investigation and Therapy, 2022
CONTEXT: Ultrasound marking of saphenous veins before vein harvesting facilitates the surgical procedure but is time-consuming. AIM: We evaluated the time benefit of saphenous veins marking by the AccuVein® AV400 system (AccuVein Inc., NY, USA) coupled ...
Pierre Ramondou, Alessandra Bura-Rivière, Wassim Mokaddem, Jeanne Hersan, Charlotte Josse, Pierre Abraham, Olivier Fouquet, Jean-Pierre Bossavy, Francois-Xavier Lapebie, Samir Henni   +9 more
doaj   +1 more source

Modelling and monitoring nonlinear acoustic phenomena in high-intensity focused ultrasound therapy

, 2017
High intensity focused ultrasound (HIFU) provides a wide range of noninvasive therapies ranging from drug delivery to the destruction of kidney stones. In particular, thermal ablation by HIFU presents an effective noninvasive method for the treatment ...
Jackson, Edward
core   +1 more source

Kelvin Probe Force Microscopy in Bionanotechnology: Current Advances and Future Perspectives

Advanced Materials, EarlyView.
Kelvin probe force microscopy (KPFM) enables the nanoscale mapping of electrostatic surface potentials. While widely applied in materials science, its use in biological systems remains emerging. This review presents recent advances in KPFM applied to biological samples and provides a critical perspective on current limitations and future directions for
Ehsan Rahimi, Mario Palacios‐Corella, Arjan Mol, Salvador Pané, Josep Puigmartí‐Luis   +4 more
wiley   +1 more source

Amplitude and phase relation of harmonics in nonlinear focused ultrasound

AIP Advances, 2022
High intensity focused ultrasound has gained rapid clinical acceptance as a noninvasive treatment for solid tumors. As implied by the name, the intensity of sound at the focus is generally large.
Delin Wu, Shenping Gao, Jian Li, Lei Yao, Xingyan Yu, Zhikai Zhang, Hengda Zhang, Xiaobo Wang   +7 more
doaj   +1 more source

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

Advanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang, Byeongseok Ryu, Sujeong Ahn, Junhyub Kim, Myeonghun Jang, Jeong Ho Cho, Won‐Gun Koh, Hyungsuk Lee   +7 more
wiley   +1 more source

Process, dynamics and bioeffects of acoustic droplet vaporization induced by dual-frequency focused ultrasound

Ultrasonics Sonochemistry
Acoustic droplet vaporization (ADV) plays a crucial role in ultrasound-related biomedical applications. While previous models have examined the stages of nucleation, growth, and oscillation in isolation, which may limit their ability to fully describe ...
Yubo Zhao, Yi Feng, Liang Wu
doaj   +1 more source

Nonlinear ultrasonic imaging in pulse-echo mode using Westervelt equation: a preliminary research

Computer Assisted Surgery, 2019
Acoustic nonlinear parameter β, was of great interest in tissue characterization in recent years. Nonlinear imaging methods have been reported to provide improved spatial and contrast resolution.
Wuxuan Chen, Peng Wang, Zhihong Zhang, Xudong Deng, Congyao Zhang, Shenggen Ju   +5 more
doaj   +1 more source

Ion‐Reconfigurable “N”‐Shaped Antiambipolar Behavior in Organic Electrochemical Transistors

Advanced Materials, EarlyView.
A unique N‐shaped negative differential transconductance (NDT) characteristics is demonstrated in single‐polymer organic electrochemical transistors through a sequential doping–redox–doping process driven by iodide ions. This redox‐driven mechanism enables low‐voltage, ion‐controlled reconfigurability and tunable current modulation, allowing seamless ...
Debdatta Panigrahi, Daniele Zucchelli, Zeinab Hamid, Christina Kousseff, Arup Sarkar, Aristea Pavlou, Zhitian Ling, Somayeh Kashani, Iain McCulloch, Paul W. M. Blom, Fabrizio Torricelli, Paschalis Gkoupidenis   +11 more
wiley   +1 more source