Mimumes by Akhlesh Lakhtakia Pennsylvania State University Department of Engineering Science and Mechanics EE 500 Graduate Colloquium Department of Electrical Engineering Penn State February 12, 2015 Forum for Electromagnetic Research Methods and Application Technologies (FERMAT) Abstract: Biological structures have evolved to be multifunctional, thereby engendering both economy and adaptability. Inspired by the plethora of surfaces and interfaces possessed by multifunctional biological structures, mimumes are microfibrous multifunctional metamaterials. Their microfibrosity enhances the roles of surface-dominated phenomenons and gives rise to multifunctionality. The chief vehicle for my conceptualization of mimumes is Parylene C, a chlorinated poly(p-xylylene) polymer that is currently used in the bulk non-fibrous form for packaging and tribological applications in electronic and medical arenas. Parylene-C mimumes are expected to display simultaneous ultrasonic, biomedical, terahertz, light, and energy functionalities. Other poly(p-xylylene) polymers are also promising candidats. Keywords: Bioinspiration, Biomedical, Biomimetics, Bioreplication, Energy harvesting, Metamaterial, Microfibrosity, Multifunctionality, Parylene C, Poly(p-xylylene), Terahertz, Ultrasonic, Ultraviolet.
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Mimumesby
Akhlesh Lakhtakia
Pennsylvania State University Department of Engineering Science and Mechanics
EE 500 Graduate Colloquium Department of Electrical Engineering Penn State February 12, 2015
Forum for Electromagnetic Research Methods and Application Technologies (FERMAT)
Abstract: Biological structures have evolved to be multifunctional, thereby engendering both economy and adaptability. Inspired by the plethora of surfaces and interfaces possessed by multifunctional biological structures, mimumes are microfibrous multifunctional metamaterials. Their microfibrosity enhances the roles of surface-dominated phenomenons and gives rise to multifunctionality. The chief vehicle for my conceptualization of mimumes is Parylene C, a chlorinated poly(p-xylylene) polymer that is currently used in the bulk non-fibrous form for packaging and tribological applications in electronic and medical arenas. Parylene-C mimumes are expected to display simultaneous ultrasonic, biomedical, terahertz, light, and energy functionalities. Other poly(p-xylylene) polymers are also promising candidats.
MulXfuncXonal materials Example: Lithium niobate Polar dielectric à ferroelectric Pyroelectric Piezoelectric Photoelas;c Electro-‐op;c à Pockels effect Op;cally nonlinear
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MulXfuncXonality
Skin DefiniXon (“bag of bones”) Thermal isolaXon TacXle and temperature sensing ColoraXon for Camouflage ColoraXon for Visual Signals
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Engineered MulXfuncXonality
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Engineered MulXfuncXonality (a) Conglomerate of single-‐funcXon devices and systems
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Engineered MulXfuncXonality (a) Conglomerate of single-‐funcXon devices and systems (b) Composite materials
MulXfuncXonal composite materials
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MulXfuncXonal composite materials
METAMATERIALS
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Metamaterials
Walser’s DefiniXon (2001)
macroscopic composites having a manmade, three-‐dimensional, periodic cellular architecture designed to produce an opXmized combinaXon, not available in nature, of two or more responses to specific excitaXon
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Metamaterials
Updated DefiniXon
macroscopic composites designed to produce an opXmized combinaXon of two or more responses to specific excitaXon
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Engineered Multifunctional
Composite Materials
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Parallel-plate capacitors
Device volume = Ad
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Parallel-plate capacitors
Device volume = Ad
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Parallel-plate capacitorsA. Lakhtakia
Parallel-plate capacitorsA. Lakhtakia
FractalsA. Lakhtakia
FractalsA. Lakhtakia
FractalsA. Lakhtakia
Multifunctional Composite Materials
General Principle
Lots of interfaces and surfaces in any fixed volume
Caveat: Mechanical strength
Multifunctional Composite Materials
microfibrous mulXfuncXonal metamaterial
Mimumes
Parylene C
US FDA Approval for implantable prostheses
Parylene Coating Services, Inc. http://www.paryleneinc.com/medicaldevices.html.