2004
DOI: 10.1088/0957-4484/15/12/021
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Development of patterns for nanoscale strain measurements: I. Fabrication of imprinted Au webs for polymeric materials

Abstract: A method is presented for patterning polymers with nanoscale gold networks and using the pattern to measure strain in the polymer. A gold film is first coated on a porous alumina template. After coating, the template is impressed into a polymer, and the template is dissolved to leave a continuous metal network on or slightly below the surface of the polymer. The network has a random structure and is electrically conductive and has potential applicability to structural health monitoring. We show that it can be … Show more

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Cited by 43 publications
(25 citation statements)
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“…We can make a rough estimate of the sheet resistance (R s ) using a correction [28] of Pi/ln2 = 4.53 to the resistance and assume zero resistance at shorter distances, giving an R s of about 100 X/sq. This could be compared with a perfect 100 nm thick gold film with bulk resistivity that should have a sheet resistance of 0.2 X/sq (from R s = resistivity/thickness and bulk resistivity of 22 nX/m), or with porous gold film fabricated on a porous aluminum template that have a R s of 4-15 X/sq for a film thickness of about 100 nm [29].…”
Section: Resultsmentioning
confidence: 99%
“…We can make a rough estimate of the sheet resistance (R s ) using a correction [28] of Pi/ln2 = 4.53 to the resistance and assume zero resistance at shorter distances, giving an R s of about 100 X/sq. This could be compared with a perfect 100 nm thick gold film with bulk resistivity that should have a sheet resistance of 0.2 X/sq (from R s = resistivity/thickness and bulk resistivity of 22 nX/m), or with porous gold film fabricated on a porous aluminum template that have a R s of 4-15 X/sq for a film thickness of about 100 nm [29].…”
Section: Resultsmentioning
confidence: 99%
“…To apply a micro-scale pattern to the specimen, the procedure described in previous publications [42][43][44][45][46] is used. For comparison to the vision-based measurements, a single strain gage is aligned with the loading direction.…”
Section: Methodsmentioning
confidence: 99%
“…In such cases, other methods (e.g., very thin film sputtering followed by exposure to moderate temperature vapor; coating of patterned surface with thin polymeric layer to improve adherence) may be necessary to develop more durable nanoscale patterns that can be used with metallic materials, though tensile experiments have not been performed over a large strain range to define the range in strain where such coatings are required. With regard to recent work by Collette et al [46], which used the nano-scale pore structure in alumina to impress a nano-scale gold pattern into a thin layer near the surface of a polymer material, the process described in this work appears to be somewhat simpler and less intrusive in the surface region of the polymer.…”
Section: Chemical Vapor Exposure For Patterning Of Thin Filmsmentioning
confidence: 99%