11,222 views Oct 21, 2010
See http://www.nano.gov/ for up-to-date info. The 2010-2011 budget for Nanotechnology is $1.8 Billion. **************************************************************** Building Nanometer Fibers or Tubes Recent advances in the fabrication of nanometer fibers or tubes offer another form of building blocks for nanostructured materials. An effective way to generate nanometer fibers (or tubes) is based on the use of membrane-template techniques (Martin 1994). Membranes, with nanochannels generated by fission-fragment tracks or by electrochemical etching of aluminum metal, are used as templates for either chemical or electrochemical deposition of conductive polymers (Pathasarathy and Martin 1994), metal (van de Zande et al. 1997), semiconductor (Klein et al. 1993), and other materials for the generation of nanofibers or tubes. Since the nanochannels on membranes are very uniform in size, the diameter and the aspect ratio of the nanofibers (or tubes) synthesized by the membrane template technique can be precisely controlled. This greatly facilitates the interpretation of optical data and the processing of these fibers (or tubes) into 2-D nanostructured materials (de Heer et al. 1995). Single-crystal semiconductor nanofibers can also be grown catalytically by metalorganic vapor phase epitaxy and laser ablation vapor-liquid-solid techniques (Hiruma et al. 1995; Morales and Lieber 1998). The synthesis of these one dimensional structures with diameters in the range of 3 to 15 nm holds considerable technological promise for optoelectronic device applications, such as the p-n junctions for light emission at Hitachi Central Research Laboratory in Japan. The advent of carbon-based nanotubes has created yet another way to fabricate nanometer fibers and tubes. These nanotubes have been used as templates for the fabrication of carbide and oxide nanotubes (Dai et al. 1995; Kasuga et al. 1998). Synthesis of nanotubes based on BN, BC3 and BC2N have also been reported (Chopra et al. 1995; Miyamoto et al. 1994). These nanotubes potentially possess large third-order optical non-linearity and other unusual properties (Xie and Jiang 1998). Metallic nanofibers synthesized by carbon-nanotube-template techniques are useful in the design of infrared absorption materials. The carbon nanotubes can now be catalytically produced in large quantities and have been used for reinforcement of nanostructural composite materials and concrete (Peigney et al. 1997). http://www.wtec.org/loyola/nano/IWGN….
25,117 views Jun 28, 2010How can all the ingredients in Morgellons could come in the same package? Hydrogels, Micelles, Dendrimers. It comes with its own super glue. Drug delivery systems involve polymer that biodegrades and some form permanent networks which use the hydrogen and oxygen from the victims own body to reassemble continually by synthetic control. VOCABULARY: Amorphous: Materials with disordered structure Condensation growth: Two molecules combine to form one single molecule, with the loss of one small molecule. Controlled degradation: The polymer comes apart gradually (biodegradable). Copolymer: Two polymers in a matrix (tripolymer-3 polymers). Cross-linked polymer: Bonds that link one polymer chain to another to promote a difference in the composite matrix. Glycolic acid: Used for face peels. Hydrophilic: Loves water Hydrophobic: Hates water Lactic acid: Produced during rigorous exercise. Ligand: Substance able to bind to and form a complex with a biomolecule to serve a biological purpose. Lower toxicity: Less damage is done to body. Molecular Synthesis: Creating synthetic molecules Monomer: See Video at 1:00 minute Polymer: Many monomers attached (linear at 1:00 min) Specific absorption: Only specific molecules cross cell membrane. Stepwise growth: Monomers react to form first dimers, trimers, oligomers and eventually long chain polymers. Time Release: Drug delivered over a period of time instead of all at once in a burst.
25,117 views Jun 28, 2010How can all the ingredients in Morgellons could come in the same package? Hydrogels, Micelles, Dendrimers. It comes with its own super glue. Drug delivery systems involve polymer that biodegrades and some form permanent networks which use the hydrogen and oxygen from the victims own body to reassemble continually by synthetic control. VOCABULARY: Amorphous: Materials with disordered structure Condensation growth: Two molecules combine to form one single molecule, with the loss of one small molecule. Controlled degradation: The polymer comes apart gradually (biodegradable). Copolymer: Two polymers in a matrix (tripolymer-3 polymers). Cross-linked polymer: Bonds that link one polymer chain to another to promote a difference in the composite matrix. Glycolic acid: Used for face peels. Hydrophilic: Loves water Hydrophobic: Hates water Lactic acid: Produced during rigorous exercise. Ligand: Substance able to bind to and form a complex with a biomolecule to serve a biological purpose. Lower toxicity: Less damage is done to body. Molecular Synthesis: Creating synthetic molecules Monomer: See Video at 1:00 minute Polymer: Many monomers attached (linear at 1:00 min) Specific absorption: Only specific molecules cross cell membrane. Stepwise growth: Monomers react to form first dimers, trimers, oligomers and eventually long chain polymers. Time Release: Drug delivered over a period of time instead of all at once in a burst.