Bond Breaker - A Game Based on CaSTL Research

Pit yourself against atomic physics in Bond Breaker, a new puzzle game based on real nano-scale science. Available here on the web, or on your iPhone and Android devices. You start this game in the smallest way possible - as a single proton. You don’t even have an atom to call your own. Learn what it takes to be a proton, experience subatomic forces, and with luck and determination, grow into an atom of your own. Collide atoms together into molecules, or break them apart again using lasers, tunneling microscopes, and heat. Simply put, this is the most fun you can have without buying your own Scanning Tunneling Microscope!

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The molecular hula-hoop (Jahn-Teller dynamics) allows direct imaging of a conical intersection

The image of the unpaired electron recorded on a single radical anion shows an orbiting orbital (hoop) driven by pseudo-rotation of the molecular frame (waist). The entangled motion ensures that the vibrational wavefunction (0.1 Å scale) is completely specified by the measured image of the electron (~10 Å orbit).

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A complete movie of a molecular bond in motion:

The movie is the tomographic reconstruction of the motion of the Br-Br bond in phase space, Wigner distribution function (WDF), at the quantum uncertainty limit of resolution in position and momentum, recorded at a frame every 5 fs. The negative hole in the distribution function (inside white contour) is the unique signature of quantum interference (cattiness of a state).

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Visualizing Chemistry One Event at a Time

The Center for Chemistry at the Space-Time Limit (CaSTL) is a multi-institutional NSF Center for Chemical Innovation.  Its central goal is to develop the science and technology necessary to directly visualize the inner workings of individual molecules as they undergo chemical change. By tracking structural changes within molecules in real-time, the aim is to capture and control chemistry in the act.

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Nanocircuits Measure Bacteria-chomping Lysozyme Action

This research proves the feasibility of recording single molecule chemistry using ultrasmall electronic devices. The project built devices out of single lysozyme molecules, and then watched the electrical signal that resulted as the enzyme went about its normal activity of chopping apart bacteria.

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Spatially and Spectroscopically Resolved Molecules on a Surface

CaSTL researchers have combined scanning tunneling microscopy (STM) with tip-enhanced Raman spectroscopy (TERS) to image polyatomic molecules adsorbed on metal surface.  They show that Raman spectra, which report on the molecular bonding structure, can be recorded with sub-nm spatial resolution.

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Rapid Vibrational Imaging With Sum Frequency Generation Microscopy

CaSTL researchers have joined forces to constructing a new type of sum-frequency generation (SFG) microscope. SFG microscopy provides detailed information on molecular structure due to its vibrational sensitivity. This laser scanning microscope has the potential to reveal precise chemical information about molecules at interfaces with sub-micrometer spatial resolution.

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Lighting Up the Interior of a Single Molecule

This study has successfully used an STM to probe the luminescence of a single molecule at the submolecular scale, reaching the ultimate resolution in real space. The atomic scale resolution in the optical emission is achieved by taking advantage of using tunneling electrons as the excitation source that is spatially confined to Ångström dimensions.

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A molecular GPS, AC/DC voltmeter. A chemically engineered nano-dumbbell

This research demonstrates a “global positioning system” for tracking single molecules in 3D space by equipping them with nano-dumbbell antennae; and the use of Raman spectra as a voltmeter to characterize AC and DC fields on nanometric scale.

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CaSTL Seminar by Paul Weiss
Thursday, December 3, 2015 - 01:00
CaSTL Seminar with Stephen K. Gray
Thursday, December 10, 2015 - 01:00
CaSTL Seminar by Ramazan Kizil
Thursday, January 7, 2016 - 01:00


  • Atomistic electrodynamics simulations

  • Visualizing surface plasmon polaritons

  • Linear and Nonlinear Optical

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