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Mechanical Engineering

Mechanical Engineering Publications

2017

Articles 1 - 2 of 2

Full-Text Articles in Nanoscience and Nanotechnology

Fluid‐Induced Alignment Of Carbon Nanofibers In Polymer Fibers, Mingchang Lu, Farrokh Sharifi, Nicole N. Hashemi, Reza Montazami Jul 2017

Fluid‐Induced Alignment Of Carbon Nanofibers In Polymer Fibers, Mingchang Lu, Farrokh Sharifi, Nicole N. Hashemi, Reza Montazami

Mechanical Engineering Publications

Carbon nanofiber/polycaprolactone (CNF/PCL) composite fibers are fabricated using a microfluidic approach. The fibers are made with different content levels of CNFs and flow rate ratios between the core and sheath fluids. The electrical conductivity and tensile properties of these fibers are then investigated. It is found that at a CNF concentration of 3 wt%, the electrical conductivity of the composite fiber significantly increases to 1.11 S m−1. The yield strength, Young's modulus, and ultimate strength of the 3 wt% CNF increase relative to the pure PCL by factors of 1.72, 2.88, and 1 ...


Enhanced Enzymatic Activity From Phosphotriesterase Trimer Gold Nanoparticle Bioconjugates For Pesticide Detection, John A. Hondred, Joyce C. Breger, Nate T. Garland, Eunkeu Oh, Kimihiro Susumu, Scott A. Walper, Igor L. Medintz, Jonathan C. Claussen Jan 2017

Enhanced Enzymatic Activity From Phosphotriesterase Trimer Gold Nanoparticle Bioconjugates For Pesticide Detection, John A. Hondred, Joyce C. Breger, Nate T. Garland, Eunkeu Oh, Kimihiro Susumu, Scott A. Walper, Igor L. Medintz, Jonathan C. Claussen

Mechanical Engineering Publications

The rapid detection of organophosphates (OPs), a class of strong neurotoxins, is critically important for monitoring acute insecticide exposure and potential chemical warfare agent use. Herein, we improve the enzymatic activity of a phosphotriesterase trimer (PTE3), an enzyme that selectively recognizes OPs directly, by conjugation with distinctly sized (i.e., 5, 10, and 20 nm diameter) gold nanoparticles (AuNPs). The number of enzymes immobilized on the AuNP was controlled by conjugating increasing molar ratios of PTE3 onto the AuNP surface via metal affinity coordination. This occurs between the PTE3-His6 termini and the AuNP-displayed Ni2+-nitrilotriacetic acid end groups and was ...