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Opportunity at Air Force Research Laboratory (AFRL)

Liquid Crystalline Polymer Actuators

Location

Materials & Manufacturing, RX/Photonic Materials

RO# Location
13.25.03.B7646 Wright-Patterson AFB, OH 454337817

Advisers

name email phone
Harris Joseph Hall harris.hall.3@us.af.mil 937.713.8980
Michael Edward McConney michael.mcconney.1@us.af.mil 937.255.9674

Description

We are looking for qualified Associates to join our team at AFRL in the Materials and Manufacturing Directorate. Working at AFRL is a unique opportunity to solve important, long-term challenges that guide research efforts in an environment that strongly encourages collaboration (government/academic/industry), publication, and conference attendance. This position is available for applicants from a broad range of backgrounds.

Specifically, this effort relates to liquid crystals. Liquid crystalline materials are pervasive in modern society as the basis of the display industry. It has been long-known that liquid crystalline materials in polymeric forms also exhibit exceptional characteristics in high performance applications as transparent armor or bulletproof vests as well as in optics and photonics. A specific class of liquid crystalline polymeric materials referred to as liquid crystalline elastomers were predicted by de Gennes to have exceptional promise as artificial muscles, owing to the unique assimilation of anisotropy and elasticity. Subsequent experimental studies have confirmed the salient features of these materials, with respect to other forms of stimuli-responsive soft matter, are actuation cycles of up to 400% as well “soft elasticity” (stretch at minimal stress). Our recent efforts have focused on developing materials chemistry amenable to integration into microfabrication processes with an eye towards MEMs as a novel actuating mechanism allowing arbitrary local control of the anisotropic mechanical properties of these materials. Enabled by this chemistry, we plan to create complex actuators and mechanical elements from liquid crystal elastomers. Notably, these materials are subject to mechanical design but homogenous in composition (lacking material/material interfaces).

References

White TJ, Broer DJ: Nature Materials 14: 1087-1098, 2015

Ware TH, et al: Science 347(6225): 982-984, 2015

Ware TH, et al: Nature Communications 7: 10781, 2016

 

Keywords:
Mechanics; Polymers; Liquid crystals; Photopolymerization; Photochemistry;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants

Stipend

Base Stipend Travel Allotment Supplementation
$76,542.00 $4,000.00

$3,000 Supplement for Doctorates in Engineering & Computer Science

Experience Supplement:
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.

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