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Nano particles and wires

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Information about Nano particles and wires
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Published on March 7, 2014

Author: aminezazi5

Source: slideshare.net

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Nano particles and wires
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Nanoparticles, nanorods, nanowires  Nanoparticles, nanocrystals, nanospheres, quantum dots, etc.      2/28/06 Drugs, proteins, etc. Nanorods, nanowires. Optical and electronic properties. Organization using biomolecules. Future possibilities. LaBean COMPSCI 296.5

Nanoparticles   Materials: QDs, magnets, noble metals Synthesis        2/28/06 Reduction of metal salt Production of insoluble salt Micelle confinement Microbial production Biomolecular nucleation Control of: composition, size, shape, crystal structure, and surface chemistry. Properties: Optical, electrical, physical, chemical LaBean COMPSCI 296.5

Nanoparticles, gold  Synthesis  2/28/06 Reduction of metal salt LaBean COMPSCI 296.5

Nanoparticles, silver  Light dependent synthesis 2/28/06 LaBean COMPSCI 296.5

Nanoparticles, organization 2/28/06 LaBean COMPSCI 296.5

QD Rainbow 2/28/06 LaBean COMPSCI 296.5

Nanowires  ECD (dc, ac, pulsed)   Polycrystalline wires (some single-crystal) Pressure injection into template pores.  Single-crystal wires Co/Cu layers from one solution by switching cathodic potential. 2/28/06 LaBean COMPSCI 296.5

Nanowires  Templates    a) Anodic alumina from acid anodized Al film to give hexagonal array of cylindrical holes. b) particle tracketched polycarbonate membrane. anodic alumina (Al2O3), nano-channel glass, ion track-etched polymers, and mica films. 10-200 nm diameter pores. CNT in templates and as templates. 2/28/06 LaBean COMPSCI 296.5

Protein templates (also CNT synth, catalyst) 2/28/06 LaBean COMPSCI 296.5

Nanowires  VLS - vapor, liquid, solid   2/28/06 Mechanism first proposed for single-crystal Si whisker synthesis (molten Au catalyst). Anisotropic crystal growth. LaBean COMPSCI 296.5

Nanowire networks   Alignment by flow in channels. Alignment on surface patterns. Amine terminated lines. 2/28/06 LaBean COMPSCI 296.5

Nanowire devices  2/28/06 Doped wires, logic gates. LaBean COMPSCI 296.5

Nanowires    More complex structures by growth. Organization of fully formed rods. Ordered growth. 2/28/06 LaBean COMPSCI 296.5

Nanowires 2/28/06 LaBean COMPSCI 296.5

Nanowires  2/28/06 Annealing LaBean COMPSCI 296.5

NanoParticles and Biomolecular Address Labels      2/28/06 Nanoparticles, nanocrystals, nanospheres, quantum dots, etc. DNA (protein) conjugation. Self-assembly using DNA (proteins). Optical and electronic properties. Future possibilities. LaBean COMPSCI 296.5

Conjugation strategies 2/28/06 LaBean COMPSCI 296.5

Chemistry: Lipoic acid Cyclic disulfides Functional Group Maleimido Silanes 2/28/06 LaBean COMPSCI 296.5

NP-NP 2/28/06 LaBean COMPSCI 296.5

Simple NP-DNA Conjugates    Multiple DNA labels per NP. Remarkable spectroscopic changes upon DNA hybridization. Sharper dissociation curve. Unlinked Linked Mirkin, C. A.; Letsinger, R. L.; Mucic, R. C.; Storhoff, J. J. Nature 1996, 382, 607. Mucic, R. C.; Storhoff, J. J.; Mirkin, C. A.; Letsinger, R. L. "DNA-Directed Synthesis of Binary Nanoparticle Network Materials," J. Am. Chem. Soc. 1998, 120, 12674-12675. 2/28/06 LaBean COMPSCI 296.5

Simple NP-DNA Conjugates Mirkin, C. A.; Letsinger, R. L.; Mucic, R. C.; Storhoff, J. J. Nature 1996, 382, 607. 2/28/06 LaBean COMPSCI 296.5

Mucic, Storhoff, Mirkin, Letsinger (1998) JACS 120, 12674-12675 NP Size variety 2/28/06 LaBean COMPSCI 296.5

Alivisatos    1:1 DNA:nanoparticle conjugates purified by PAGE. Au NP stablized with dipotassium bis(psulfonatophenyl)phenylphosp hane dihydrate. Binary and ternary complexes made. 2/28/06 LaBean COMPSCI 296.5

Undecagold • 11 gold atoms • < 1 nm diameter • monofunctional 2/28/06 LaBean COMPSCI 296.5

NP networks 2/28/06 LaBean COMPSCI 296.5

NP protein 2909-2912 2/28/06 LaBean COMPSCI 296.5

DX tile + 1.4 nm gold 2/28/06 LaBean COMPSCI 296.5

Organization of Streptavidin and Gold with TAE Linear Assembly TAE linear organizer 500x500 nm H. Li, S- H. Park, J. H. Reif, T. H. LaBean, and Hao Yan, (2004) DNA Templated Self-Assembly of Protein and Nanoparticle Linear Arrays, J. Am. Chem. Soc. 126, 418419. 2/28/06 500x500 nm LaBean COMPSCI 296.5

DNA Lattice Patterned 2D Nanoparticle Arrays    Nanoparticle/oligonucleotide conjugate (1:1) 4x4 Tile array. Research challenge: compatible conditions for solubility and assembly. H. Li, S- H. Park, J. H. Reif, T. H. LaBean, and Hao Yan, (2004) DNA Templated Self-Assembly of Protein and Nanoparticle Linear Arrays, J. Am. Chem. Soc. 126, 418-419. 2/28/06 LaBean COMPSCI 296.5

152-155 Remote control of H-bonding Here we demonstrate remote electronic control over the hybridization behavior of DNA molecules, by inductive coupling of a radio-frequency magnetic field to a metal nanocrystal covalently linked to DNA15. Inductive coupling to the nanocrystal increases the local temperature of the bound DNA, thereby inducing denaturation while leaving surrounding molecules relatively unaffected. Moreover, because dissolved biomolecules dissipate heat in less than 50 picoseconds, the switching is fully reversible. 49 GHz = optimal 1 GHz used 2/28/06 LaBean COMPSCI 296.5

Nanorod building blocks 1 4354-4363 Metallic nanowires offer more control of surface chemistry, length, diameter, and transport properties compared to CNT or semiconductor nanowires. 2/28/06 LaBean COMPSCI 296.5

4354-4363 Nanorod building blocks 2 2/28/06 LaBean COMPSCI 296.5

4354-4363 Nanorod building blocks 3 2/28/06 LaBean COMPSCI 296.5

NP biosensor 2/28/06 LaBean COMPSCI 296.5

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