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Seeing With Sound

delete2026-02-01
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PRE
AI
A
Alexandra L. Patterson
H
Hyunwoo Song
D
Dajie Zhang
S
Seth Billings
E
Emad M. Boctor
J
James B. Spicer *
DOI:10.1109/MNANO.2026.3660024delete
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摘要

摘要

En 中文
全球数千万人受疾病影响导致退行性视力丧失,最终永久失明,而关键的视觉细胞——视网膜神经节细胞(RGCs)——仍保持完整且功能正常。图像信息可能通过功能正常的RGCs被发送至大脑视觉皮层,方法是利用激光诱导的光声响应激发由聚合物基质纳米复合材料(PMNC)制成的视网膜植入物。该植入物呈双层结构,其中一层为PMNC,另一层为纯聚合物(不含纳米颗粒)。PMNC由钯掺杂聚二甲基硅氧烷制成,采用化学气相沉积法制备。PMNC的有效性能取决于纳米颗粒(包括其尺寸、数密度和分布)以及聚合物基质的性能。本研究中,采用高频水听器实验捕获了PMNC的声输出。基于颗粒的绝热温升,单脉冲在PMNC近颗粒区域的温升估计为890°C/(mJ/mm²),而脉冲串在复合材料体相的温升估计为前侧563°C/(mW)、后侧69°C/(mW)。这些确定的温度极限是设计加速可靠性测试的关键因素,该测试旨在评估该材料作为视网膜假体的可靠性。
Keyword:
Implants
Retina
Polymers
Prosthetics
Acoustics
Laser excitation
Ultrasonic imaging
Surface emitting lasers
Spatial resolution
Photoacoustic effects
Accelerated aging
acoustic materials
materials science
medical devices
nanocomposites
near-infrared absorption
photoacoustic
retinal prosthetic
thermal modeling
ultrasonic device

期刊

I
IEEE Nanotechnology Magazine
IF:
2.7
论文数:
27
被引数:
0

机构

J
Johns Hopkins University Applied Physics Laboratory
学者数:
1.9K
论文数: 1.4K
被引数: 3.1K
 
 johns hopkins university
学者数:
3.9K
论文数: 1.5K
被引数: 0
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