Please use this identifier to cite or link to this item:
http://ri.uaemex.mx/handle20.500.11799/105758| DC Field | Value | Language |
|---|---|---|
| dc.creator | Arup Neogi | - |
| dc.creator | Ezekiel Walker | - |
| dc.creator | Delfino Reyes López | - |
| dc.creator | Yuqi Jin | - |
| dc.date | 2019-09-30 | - |
| dc.date.accessioned | 2022-04-21T06:02:17Z | - |
| dc.date.available | 2022-04-21T06:02:17Z | - |
| dc.identifier | http://hdl.handle.net/20.500.11799/105758 | - |
| dc.identifier.uri | http://ri.uaemex.mx/handle20.500.11799/105758 | - |
| dc.description | Solid phononic crystal (PnC) lenses were made active on infiltration with thermosensitive polymers to produce a thermoactuated hybrid solid lens with variable focusing. Acoustic lenses, both solid state and PnCbased, are passive elements with a fixed focal length. Their focal characteristics are functions of the lens structure or the arrangement of the PnC unit cell. Dispersion effects, liquid-filled membranes, and phase delay in a multi-element emitter have been used for variable focusing. The high thermal, electric, and electromagnetic sensitivity of the elastic properties of poly(vinyl alcohol) (PVA) poly(N-isopropylacrylamide) (PNIPAm)-based hydrogels enable them to operate as tunable solids. However, these solids do not have strong enough contrast with water or well-controlled shape parameters to function as standalone lenses. Here, a tunable hybrid solid ultrasonic lens is realized by combining a PnC lens with PVA-PNIPAm thermoacoustic hydrogel to modify the transmission and dispersion properties of transient acoustic waves. Variable focusing is demonstrated from 40 to 50 mm using the anomalous thermosensitivity of the elasticity and speed of sound of the hydrogel. | - |
| dc.description | NSF | - |
| dc.language | eng | - |
| dc.publisher | ACS | - |
| dc.relation | 4 | - |
| dc.rights | info:eu-repo/semantics/openAccess | - |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | - |
| dc.source | 2470-1343 | - |
| dc.subject | Acoustic lenses | - |
| dc.subject | Hydrogel | - |
| dc.subject | info:eu-repo/classification/cti/1 | - |
| dc.title | Tunable hybrid phononic crystal lens using thermo-acoustic polymers | - |
| dc.type | article | - |
| dc.audience | students | - |
| dc.audience | researchers | - |
| item.grantfulltext | none | - |
| item.fulltext | No Fulltext | - |
| Appears in Collections: | Producción | |
Google ScholarTM
Check
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.