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Technology at the angstrom level, and the future of nanotechnology. Introduces the EMI diagram (Energy, Mass, and Information) of angstrom engineering.

Technology at the angstrom level, and the future of nanotechnology. Introduces the EMI diagram (Energy, Mass, and Information) of angstrom engineering.



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Angstromology Angstromology Presentation Transcript

  • Angstromology Introduction to Nanotechnology Foothill College
  • Overview
    • Nanoscale definitions
    • Scale and dimension (not just small)
    • Working at the angstrom level
      • Nanotechnology – the last 200 years
    • Nanotechnology – the next 100 years
      • Beyond nano – to pico scale and beyond
    • Innovation in the quantum universe
  • Nano Definitions
    • Design, engineer, manufacture , or …
    • Control a process
      • at the nanoscale dimension
    • Atom by atom precise manipulation
    • Functionalize and monetize properties at the nanoscale dimension
    • ‘ Bottom up manufacturing’ self-assembly
  • Traditional Nanotechnology
  • Nano Definitions Further
    • Nanotechnology is the study, design, creation, synthesis, manipulation, and application of functional materials, devices, and systems through control of matter and energy at the nanometer scale (1–100 nanometers, one nanometer being equal to 1 × 10 −9 of a meter).
    • Exploitation of novel phenomena, including the properties of matter , energy , and information at the molecular, atomic, and sub atomic levels.
  • LEONARD MANDEL (at left) and co-workers at the University of Rochester gather around a parametric down-converter, an unusual crystal that converts any photon striking it into two photons with half as much energy. Mandel's group pioneered the use of the device in tests of quantum mechanics. New experiments - real and imagined - are probing ever more deeply into the surreal quantum realm
  • Nanoscale Paradigm Miniaturization from the top down Moore’s Law 20 th Century Quantum properties from the bottom up Moore’s Law 21 st Century Concept by Hilary Lackritz 1950 – 2000 Era of materials 2000 – 2050 Era of quanta
  • Scale and Dimension
    • Quantum scale dimension
      • Small things
      • Short times
      • Small numbers
      • Low probabilities
    • Heisenberg and Plank got it right
      • Heisenberg uncertainty principle
    • Things happen differently at nanoscale
  • What could be nanotechnology ?
    • Chemistry
    • Viral self-assembly
    • Cellular process
    • Nuclear fission
    • Quantum computing
    • Squeezed light
    • Molecular tweezers
  • Chemistry
    • Precision placement (yes)
    • Molecule by molecule (maybe)
    • Working with moles (a lot)
    • Surface chemistry (always)
    • Particles and colloids (if small enough)
    • Chemists guide atoms and molecules to particular places (with help from nature )
  • Chemical Reaction CO and O 2 Reacting to Form CO 2 Works in the gas phase but not on a surface!
  • Surface Femtochemistry CO ads + O ads ---- on transition metal surface ----> CO 2 gas Although the reaction cannot be initiated by conventional heating, excitation with a femtosecond pulse triggers the oxidation of CO on a ruthenium surface, leading to the formation of CO 2 .
  • Surface Femtochemistry Sketch illustrating that only desorption occurs when the system is excited thermally, due to the lower energy required for CO-desorption than for O- activation. Under laser excitation, the 1.8 eV barrier for O-activation is overcome by coupling to the hot electrons, so that CO 2 is formed.
  • Potential energy surface for the CO/O/Ru(0001) system, constructed from spectroscopic data, assuming Morse potentials. Lines are the result of preliminary trajectory calculations. Going up, the O-CO distance increases, whereas the Ru-O distance remains constant: CO desorbs. To the right, the O-CO distance decreases (CO approaches oxygen), while O moves away from Ru: CO 2 is formed and moves away from the surface. Thermally, only the pathway up is accessible. Upon femtoseond excitation, regions of the potential energy surface become accessible that are inaccessible under thermal activation: The system is directed into new reactive regions. Surface Femtochemistry
  • Dendrimers
    • Dendrimers
      • Branching
      • Stepwise growth
      • Globular nature
      • Functionalization
    • Engineer like a protein
      • Surface energy / shape
    • Can be grafted to C60 buckyballs / modified
    • Controlling a process
  • Generation 2 PAMAM Dendrimer
  • Cellular Processes
    • DNA
    • Micro RNAs
    • Proteins
    • Ribosomes
    • Enzymes
    • Lipid bilayer
    • Ion channels
  • Photochemistry Bio-Nano Energy In cyclic photophosphorylation electrons from ferredoxin (Fd) are shuttled into the cytochrome b 6 f complex which then pumps protons out of the stroma into the thylakoid lumen. The resulting gradient can be used to drive ATP syntheses by the chloroplast ATP synthase.
  • Protein Capturing Light Photosynthesis moves EM energy into life through carbon
  • Protein Pumps and Energy
  • Self Assembly
    • Crystals
    • Proteins
    • Viruses
    • Fractals
    • Self-assembly is a process
      • Nature has harnessed it
      • Nanotechnology will harness it
  • Self Assembly
    • Follows statistical thermodynamics
    • Crystal growth follows symmetry rules
    • Seen in molecular monolayers
    • Building process for viral caspids
    • Interaction of matter and information
    • Use nature to guide manufacturing
      • Control and guide novel structures
  • Molecular Self Assembly Figure1: 3D diagram of a lipid bilayer membrane - water molecules not represented for clarity
    • Figure 2: Different lipid model
    • top : multi-particles lipid molecule
    • bottom: single-particle lipid molecule
  • Viral Self-Assembly
  • Bio-Nano Convergence Jonathan Trent NASA - Ames
  • Nuclear Fission
    • Fission at the pico scale
    • Assembling a critical mass
    • Creating a chain reaction
      • Controlling the number of events
      • Neutrons and the uranium U 235 isotope
    • Unleashes the power of a star
      • Required an understanding of the atom
  • Nuclear Fission
  • Thin Film Deposition
    • Layer by layer deposition
      • Most thin film layers are 10 to 1000A thick
      • Deposition can occur one monolayer at a time
    • Atom by atom nucleation
      • Clusters of atoms influence each other
      • Ordering process can occur very quickly
    • Tailored properties based on process
      • Optical, electrical, and magnetic
      • Interfacial chemistry can be critical
  • Thin Film Deposition
  • Atomic Spectroscopy
    • Energy and matter
    • AES / LEEDS
    • SEM / EDX
    • ESCA / XPS
    • XRF / EXAFS
    • SIMMS
  • Photoelectric Effect
  • Quantum Computing Three trapped 112 Cd + ions exhibit four different normal modes of oscillation in an asymmetric Paul trap
  • Qubit Computing
    • Qubit states
    • 00, 01, 10, 11
    • Qubit algorithms
    • New thinking
    • New problems
    Centre for Quantum Computing
  • Uncertain Computing
    • Quantum world is based in probabilities
    • Quantum states can be either 1 or 0, or in some cases – both!
    • Leverage uncertainty and ultra density for unimaginable speed:
    • > 10 22 transistors
    • > 10 15 clock speed
  • Nano-Bio-Info Nano Bio Info Self assembly Microarrays, BioMEMS Quantum computing nanoelectronic devices Digital cells DNA computing insilico biology Concept by Robert Cormia
  • Nano-Bio
    • Using protein / viral complexes and DNA to self-assemble devices, and novel function, into biomechanical systems
    Earth’s early nanostructures ~ 2 billion years ago
  • Digital Cells – Bio Informatics Modeling life as an information system
  • Nature as a Computer
    • Biological systems like DNA and RNA especially appear to be more than networks of information.
    • RNA itself can be seen as a molecular decision network
  • Nanoelectronics
    • Pushing semiconductors to the edge
    • Electrons moving too fast, or ‘confined’
    • Band gap theory
    • Quantum tunneling effects
    • Semiconduction has always been ‘nano’
      • Now we are deliberately doing it
  • Nanoelectronics Flux-qubit systems Mesoscopic quantum systems SEM picture of a "persistent-current qubit" sample. The inner loop which contains three Josephson junctions is the qubit. The outer loop, containing two junctions, is a SQUID which measures the qubit's state. microwave pulses of variable length and amplitude to coherently manipulate the quantum state of the loop. The readout by the Squid was also pulsed and revealed quantum-state oscillations with high fidelity.
  • Quantum Tunneling
    • Breaking the quantum barrier
      • Quantum Tunneling in nanoelectronics
      • Macroscopic Quantum Coherence
    • Meeting the particle / wave head on
    • It can be a problem or a property
      • Clock speeds on the edge of tunneling
      • Or a way to store ‘information in energy’
  • Quantum Tunneling Transistor http://www. sandia .gov/media/ quantran .htm
  • Quantum Dots
    • Quantum confinement
      • Energy and information states
    • Small atomic assemblies
    • Used in solar collection devices
      • With very high quantum efficiencies
    • Applications in memory storage
    • Applications in quantum computing
  • Quantum Dots Quantum dots are small devices that contain a tiny droplet of free electrons. They are fabricated in semiconductor materials and have typical dimensions between nanometers to a few microns. The size and shape of these structures and therefore the number of electrons they contain, can be precisely controlled; a quantum dot can have anything from a single electron to a collection of several thousands. The physics of quantum dots shows many parallels with the behavior of naturally occurring quantum systems in atomic and nuclear physics. As in an atom, the energy levels in a quantum dot become quantized due to the confinement of electrons. Unlike atoms however, quantum dots can be easily connected to electrodes and are therefore excellent tools to study atomic-like properties. There is a wealth of interesting phenomena that have been measured in quantum dot structures over the past decade.
  • Carbon Nanotubes
    • Like graphite but all coiled up
    • Typically 10 Angstroms in diameter
    • Two key parameters control properties
      • M/N ratio determines electrical conductivity
    • SWNT and MWNT
      • Transistors, heat sinks, hydrogen storage
    • Carbon fibers have come a long way!
  • Carbon Nanotube Structures
  • Nanotubes / Nanohorns The electrical properties of nanotubes / nanohorns can change, depending on their molecular structure. The "armchair" type has the characteristics of a metal; the "zigzag" type has properties that change depending on the tube diameter—a third have the characteristics of a metal and the rest those of a semiconductor; the "spiral" type has the characteristics of a semiconductor.
  • Nanotube Properties
  • Self Assembled Nanostructures?
  • Nanoscale Emergence
    • We live in an ‘emergent’ universe
      • Billiard balls vs. fuzzy functions
      • Quantum rules have ‘leveled out’
    • Ensembles act in Newtonian physics
    • In smaller networks of 1,000s of atoms
      • Atoms influenced by the quantum world
    • The trick is to tap the inner rules of nature , and design them into our world
  • Nanoscale Emergence Billiard balls Fuzzy functions Angstroms (10 -8 cm) Microns / meters Atoms Electrons Quanta Dust Rain Rocks Emergent properties   Quantum properties Concept by Robert Cormia
  • What Really Defines ‘Nano’?
    • Working at the ‘quantum scale’
      • Working in small numbers
      • Working in small dimensions
      • Working in small time scales
    • Let the universe drive – but we steer
      • Self assembly, quantum computing
    • Trapping nano properties at the macro scale – tailoring key physical properties
  • Nanoscale Dimension - EMI Mass Energy Information Forces Self-assembly Quantum states Concept by Robert Cormia
  • Nanoscale Dimension - EMI
    • Matter
    • Energy
    • Information
    • Forces
    • Quantum states
    • Self assembly
    Force – interaction of matter and energy Quantum states – interaction of energy and information Self assembly – interaction of matter and information Nanotechnology touches the ‘inner universe’
  • Nanoscale Engineering @ EMI
    • Energy
      • Tunneling in quantum devices, band gaps
    • Mass
      • Melting points, strength, self-assembly
    • Information
      • Quantum computing / genetic algorithms
    • Real nanotechnology occurs @ EMI
  • Summary
    • Everything is small – big is an illusion
    • Small is necessary, but not sufficient
      • Small just gets you to the quantum world
    • Design, engineer, and / or manufacture
      • Or control a quantum mechanical process
    • Functionalize and monetize at ‘small’
      • Nanoscience and nanotechnology @EMI
    • Let the quantum universe help us out
  • Orders of Scale
    • Giga – billion, 10 e9
    • Mega – million, 10 e6
    • Kilo – thousand, 10 e3
    • Macro – referring to big or visible
    • Milli – 10 e -3
    • Micro – referring to small, also 10 e -6
    • Nano – 10 e -9
    • Pico – 10 e -12
    • Femto – 10 e -15