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 | | Gold Nanorod Based Selective Identification of Escherichia coli Bacteria | | We report for the first time that two-photon Rayleigh scattering (TPRS) properties of gold nanorods can be used for rapid, highly sensitive and selective detection of E. coli bacteria from aqueous solution, without any amplification or enrichment at the 50 colony forming units (cfu)/mL level with excellent discrimination against other bacteria. TPRS intensity increases 40x when anti-E. coli antibody-conjugated nanorods were mixed with various concentrations of E. coli O157:H7 bacterium. These bionanotechnology assays could be adapted to specific, bioterrorism-related antibodies. | | | Added: 1 months ago, in category: My Research | | Uploaded by: Paresh Ray | | Comments: 1 / Views: 60 / Avg Rating: 4.00 | | | |
 | | Nanofiber Scaffolds with Gradations in Mineral Content for Mimicking the Tendon-to-Bone Insertion Site | | We have demonstrated a simple and versatile method for generating a continuously graded, bone-like calcium phosphate coating on a nanowoven mat of electrospun nanofibers. A linear gradient in calcium phosphate content could be achieved across the surface of the nanofiber mat. The gradient had functional consequences with regard to stiffness and biological activity. Specifically, the gradient in mineral content resulted in a gradient in the stiffness of the scaffold and further influenced the activity of mouse preosteoblast MC3T3 cells. This new class of nanofiberbased scaffolds can potentially be employed for repairing the tendon-to-bone insertion site via a tissue engineering approach. | | | Added: 2 months ago, in category: My Research | | Uploaded by: Xiaoran Li | | Comments: 0 / Views: 99 / Avg Rating: 4.00 | | | |
 | | Nanogold: A quantitative phase diagram | | Phase diagrams are obviously a useful way of predicting the stable structure, shape or phase of a nanoparticle as a function of size and temperature, but they are also provide information as to how unstable particles are when they are grown far from equilibrium. Until recently growing gold nanoparticles (for example) was a little like a box of chocolates - you never know what you were going to get! Also see DOI: 10.1021/nn900220k | | | Added: 5 months ago, in category: My Research, Other | | Uploaded by: Amanda Barnard | | Comments: 0 / Views: 157 / Avg Rating: 3.00 | | | |
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 | | Carbon Nanotube Pumping for Drug Delivery | | One exciting potential application of nanotechnology is to revolutionize the ways of drug delivery. A tiny nanostructure, such as a carbon nanotube (CNT) is small enough to cross the cell membrane and enter the nuclei of the cell, while the cell does not recognize the nanotube as an unfriendly intruder. Therefore, a CNT can be used effectively as a vehicle to deliver drugs to the targeted sick cell (such as a cancer cell) with unprecedented accuracy and efficiency. The uptake of drug molecules from a solution into a CNT can be achieved automatically by Van der Waals attraction between the nanotube and drug molecules. But a mechanism for a CNT to release the drug is lacking. This video shows a new nanopumping process for a CNT to release a C-20 molecule, as a prototype device for drug delivery. An oscillating tip actuator generates a sustained mechanical wave in the CNT, which acts like a nanopump to drive and eject the 'drug' molecule out of the tube. | | | Added: 9 months ago, in category: My Research, Past Contest - What is Nano? | | Uploaded by: min chen | | Comments: 4 / Views: 1763 / Avg Rating: 2.00 / Weighted Rating : 2.00 | | | |
 | | ACS_Nano_2-1807_MPI.wmv | | This video pictures the highlight of a recent publication in ACS Nano 2008, 2, 1807. This work is devoted to the interaction of nanoparticles and their role in remote release of encapsulated materials. The permeability of polymeric microcapsules and temperature rise on nanoparticles are also investigated. | | | Added: 9 months ago, in category: My Research, Past Contest - What is Nano? | | Uploaded by: Andre Skirtach | | Comments: 2 / Views: 353 / Avg Rating: 3.00 / Weighted Rating : 2.86 | | | |
 | | Entranced by Nanoscale Force Microscopy | | Inspired by "Nanoscale magnetic resonance imaging," by C. L. Degen, M. Poggio, H. J. Mamin, C. T. Rettner, and D. Rugar, Proc. Nat. Acad. Sci. U.S.A. (2009), doi: 10.1073/pnas.0812068106.
This is an imaginative representation of the components and principles behind nanoscale magnetic resonance imaging. Nuclear magnetic resonance and ultrasensitive force microscopy are combined to enable a detection sensitivity of a hundred or so proton spins. | | | Added: 9 months ago, in category: My Research, Past Contest - What is Nano? | | Uploaded by: Martino Poggio | | Comments: 0 / Views: 203 / Avg Rating: 1.00 / Weighted Rating : 1.19 | | | |
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