| Catalogue of Synthetic Hairs (last updated 9/2/04 by C. Majidi) Example
fibrillar structures from polyimide, polyester, PDMS, and epoxy. While
some of these hairs arrays showed adhesive properties, work since
2006 has focussed on thermoplastics such as PP and PE which have more
convenient processing capabilities. This incomplete catalogue is mainly
for internal reference.
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| Picture |
Date |
Description |
Preparation |
|
8/27/02 |
Polyester Nanobumps; 230-440 nm tip radius; 3 um tall; 10e6/cm2
density |
Casting
in AFM indented wax |
|
8/27/02 |
Silicone
Rubber Microbumps; 6 um wide; 6 um tall; 5e4/cm2 |
Casting
in Poretic |
|
8/25/03 |
Epoxy
Hairs; 200 nm wide; 2-60 um tall; 2e9/cm2 |
Casting
in Anodisc; Polished w/ Minimet |
|
4/30/04 |
Epoxy
Hairs; 100 nm wide; 60 um tall |
Casting
in Anodisc |
|
4/30/04 |
Epoxy
Hairs; 200 nm wide; 60 um tall; 2e9/cm2 |
Casting
in Anodisc |
|
6/14/04 |
Inclined
Epoxy Hairs; 200 nm wide; 2e9/cm2 |
Casting
in Anodisc |
|
6/14/04 |
Epoxy
Hairs; 200 nm wide |
Casting
in Anodisc filled with Micropolishing Nanoparticles; Cured hair array
mounted on a second layer of epoxy |
|
6/14/04 |
Epoxy
Stalk; 20 um wide; sparse |
Paint
Coated Anodisc is first patterned with Laser and etched in NaOH to form larger,
micron wide pores; epoxy casted in this "micromachined" anodisc |
|
6/17/04 |
Epoxy
Hairs; 200 nm wide; 2e9/cm2 |
Casting
in Anodisc |
|
6/17/04 |
Epoxy
Tubes; 200 nm wide; 2e9/cm2 |
Casting
in Anodisc |
|
6/17/04 |
Epoxy
Hairs; 200 nm wide |
Casting
in Anodisc filled with Micropolishing Nanoparticles; Cured hair array
mounted on a second layer of epoxy |
|
6/17/04 |
Polycarbonate
Coated 2575 Polyimide Hairs; 2 um wide; 20 um tall; 3e6/cm2 |
Isopore
filter applied to spun coat Polyimide; Soft-baked at up to 200 deg.C on hotplate;
Submerged in Methylene Chloride. (Not fully etched.) |
|
6/17/04 |
Polycarbonate
Coated 2575 Polyimide Hairs; 5 um wide; 20 um tall; 5e5/cm2 |
Casting
in Isopore; Soft-baked. Not full etch. |
|
8/27/04 |
2611 Polyimide
Hairs; 0.2 um wide; 4e8/cm2 |
Casting
in Isopore; Soft-baked; Agitated during Methylene Chloride etch |
|
8/27/04 |
2611 Polyimide
Hairs; 0.4 um wide; 9e7/cm2 |
Casting
in Isopore; Soft-baked; Agitated |
|
8/27/04 |
2611 Polyimide
Hairs; 0.2 um wide; 20 um tall; 5e7/cm2 |
Casting
in Isopore; Soft-baked; Agitated |