Investigation on micro-patterned gold-plated polymer substrate for a micro hydraulic actuator

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dc.contributor.author Akle, Barbar
dc.contributor.author Leo, Donald J.
dc.contributor.author Sundaresan, Vishnu Baba
dc.date.accessioned 2017-06-01T06:47:05Z
dc.date.available 2017-06-01T06:47:05Z
dc.date.copyright 2006 en_US
dc.date.issued 2017-06-01
dc.identifier.uri http://hdl.handle.net/10725/5691
dc.description.abstract Plants have the ability to develop large mechanical force from chemical energy available with bio-fuels. The energy released by the cleavage of a terminal phosphate ion during the hydrolysis of a bio-fuel assists the transport of ions and fluids in cellular homeostasis. Materials that develop pressure and hence strain similar to the response of plants to an external stimuli are classified as nastic materials. This new class of actuators use protein transporters as functional units to move species and result in deformation [Leo et al 2005 (Proceedings of IMECE - 06)]. The ion transporters are hydrocarbons which are formed across the cellular membranes. The membranes that house the ion transporters are aggregates of phospholipids rigidized by cytoskeleton. Reconstituting these nano-machines on a harder matrix is quintessential to build a functional device. Artificial phospholipid membranes or Biliayer lipid membranes (BLM) have poor structural integrity and do not adhere to most surfaces. Patterned arrays of pores made on Poly-propylene glycol-diacrylate (PPG-DA) substrate, a photo curable polymer was made available to us for initial design iterations for an actuator. Hydrophobicity of PPG-DA posed initial problems to support a BLM. We modified the surface of micropatterned PPG-DA membrane by gold plating it. The surface of the porous PPG-DA membranes was plated with gold (Au). A 10nm seeding layer of Au was sputtered on the surface of the membrane. Further gold was reduced onto the sputtered gold surface [Supriya et al(Langmuir 2004, 20, 8870-8876)] by suspending the samples in a solution of hydroxylamine and Hydrogen tetrachloroaurate(III) trihydrate [HAuCl4.3H2O]. This reduction process increased the thickness of the gold, enhanced its adhesion to the PPG-DA substrate and improved the shapes of the pores. This surface modification of PPG-DA helped us form stable BLM with 1-Palmitoyl-2-Oleoyl-sn-Glycero-3- [Phospho-L-Serine] (Sodium Salt) (POPS), 1-Palmitoyl-2-Oleoyl-sn-Glycero- 3-Phosphoethanolamine (POPE) lipids. The observed ionic resistance of the BLM remained stable and sustained 4 mm water column for the the four hours observation period. This article describes the procedure we adopted to modify the PPG-DA substrate, form a BLM and the procedure to quantify the stability of the BLM formed with -amine and -thiol head groups in the lipids. en_US
dc.language.iso en en_US
dc.title Investigation on micro-patterned gold-plated polymer substrate for a micro hydraulic actuator en_US
dc.type Conference Paper / Proceeding en_US
dc.author.school SOE en_US
dc.author.idnumber 200700940 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.embargo N/A en_US
dc.keywords Gold en_US
dc.keywords Polymers en_US
dc.keywords Actuators en_US
dc.keywords Chemicals en_US
dc.keywords Resistance en_US
dc.keywords Sodium en_US
dc.keywords Water en_US
dc.keywords Hydrogen en_US
dc.keywords Ions en_US
dc.keywords Matrices en_US
dc.identifier.doi http://dx.doi.org/10.1117/12.658613 en_US
dc.identifier.ctation Sundaresan, V. B., Akle, B., & Leo, D. J. (2006, March). Investigation on micro-patterned gold-plated polymer substrate for a micro hydraulic actuator. In Smart Structures and Materials (pp. 61701U-61701U). International Society for Optics and Photonics. en_US
dc.author.email barbar.akle@lau.edu.lb en_US
dc.conference.date February 26, 2006 en_US
dc.conference.place San Diego, California, USA en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1281706 en_US
dc.author.affiliation Lebanese American University en_US
dc.relation.numberofseries 6170 en_US
dc.title.volume Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics en_US

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