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Weiss Group Meetings Self-Assembly & Molecular Devices Multi-Group Meetings
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Biocapture Surfaces and Molecular Devices
Paul S. Weiss, Departments of Chemistry and Physics and Anne M. Andrews, Department, The Pennsylvania State University, University Park, PA 16802-6300, USA
We use molecular design, tailored syntheses, intermolecular interactions and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measurements of single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood and exploited at unprecedented scales. We look at how these interactions influence the chemistry, dynamics, structure, electronic function and other properties. Such interactions can be used to advantage to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. These nanostructures can be taken all the way down to atomic-scale precision or can be used at larger scales. We select and tailor molecules to choose the intermolecular interaction strengths and the structures formed within the film.
We employ some of these approaches in directed assembly and chemical patterning to enable bioselective and biospecific binding. These probes are isolated in well-defined matrices and spaced at the sub-10-nanometer scale using combinations of soft lithography, conventional lithography, and self-assembly. We have developed the patterning tools, as well as the diagnostics and metrology tools for these new chemically patterned structures.
We also selectively test hypothesized mechanisms for electronic switching by varying molecular design, chemical environment, and measurement conditions to enable or to disable functions and control of these molecules with predictive and testable means. Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, comparable to those found in ensemble-averaging measurements, while retaining the heterogeneity of the measurements. We demonstrate the importance of these junctions in conductance switching of single molecules. We now apply these strategies to photo-driven, electrochemically-driven, and chemically-driven motion in single molecules and assemblies. This enables us to address how concerted nano-scale motions can be used to drive motion at larger scales. The atomic-scale details provide surprising and useful insights into the limitations and opportunities of cooperative motion.
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
Paul S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
We use molecular design, tailored syntheses, intermolecular interactions and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measurements of single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood and exploited at unprecedented scales. We look at how these interactions influence the chemistry, dynamics, structure, electronic function and other properties. Such interactions can be used to advantage to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. These nanostructures can be taken all the way down to atomic-scale precision or can be used at larger scales. We select and tailor molecules to choose the intermolecular interaction strengths and the structures formed within the film. We employ some of these approaches in directed assembly to enable bioselective and biospecific binding. We also selectively test hypothesized mechanisms for electronic switching by varying molecular design, chemical environment, and measurement conditions to enable or to disable functions and control of these molecules with predictive and testable means. Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, comparable to those found in ensemble-averaging measurements, while retaining the heterogeneity of the measurements. We quantitatively compare the conductances of molecule-substrate junctions. We demonstrate the importance of these junctions in conductance switching of single molecules. We now apply these strategies to photo-driven, electrochemically-driven, and chemically-driven motion in single molecules and assemblies. This enables us to address how concerted nano-scale motions can be used to drive motion at larger scales. The atomic-scale details provide surprising and useful insights into the limitations and opportunities of cooperative motion.
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
Paul S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
We use molecular design, tailored syntheses, intermolecular interactions and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measurements of single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood and exploited at unprecedented scales. We look at how these interactions influence the chemistry, dynamics, structure, electronic function and other properties. Such interactions can be used to advantage to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. These nanostructures can be taken all the way down to atomic-scale precision or can be used at larger scales. We select and tailor molecules to choose the intermolecular interaction strengths and the structures formed within the film. We employ some of these approaches in directed assembly to enable bioselective and biospecific binding. We also selectively test hypothesized mechanisms for electronic switching by varying molecular design, chemical environment, and measurement conditions to enable or to disable functions and control of these molecules with predictive and testable means. Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, comparable to those found in ensemble-averaging measurements, while retaining the heterogeneity of the measurements. We quantitatively compare the conductances of molecule-substrate junctions. We demonstrate the importance of these junctions in conductance switching of single molecules. We now apply these strategies to photo-driven, electrochemically-driven, and chemically-driven motion in single molecules and assemblies. This enables us to address how concerted nano-scale motions can be used to drive motion at larger scales. The atomic-scale details provide surprising and useful insights into the limitations and opportunities of cooperative motion.
Quantitative Scanning Probe Measurements of Single Atoms, Molecules and Assemblies: Preserving and Understanding Heterogeneity
Paul S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
Interactions within and between molecules can be designed, directed, measured, understood and exploited at unprecedented scales. We look at how these interactions influence the chemistry, dynamics, structure, electronic function and other properties. Such interactions can be used to advantage to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. These nanostructures can be taken all the way down to atomic-scale precision or can be used at larger scales. We measure these interactions and the electronic perturbations that underly them using scanning tunneling microscopy. In these and other measurements, we collect substantial data sets in order to generate distributions with the statistics of ensemble-averaging techniques, while still retaining all the single molecule and environmental information.1-3 This requires new automated tools for acquisition and analyses. We also use molecular design, tailored syntheses, intermolecular interactions and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measurements of single or bundled molecules. We select and tailor molecules to choose the intermolecular interaction strengths and the structures formed within the film. We selectively test hypothesized mechanisms for electronic switching by varying molecular design, chemical environment, and measurement conditions to enable or to disable functions and control of these molecules with predictive and testable means.4,5 Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, comparable to those found in ensemble-averaging measurements, while retaining the heterogeneity of the measurements.
1. Imaging Substrate-Mediated Intermolecular Interactions, M. M. Kamna, S. J. Stranick, and P. S. Weiss, Science 274, 118 (1996).
2. Long-Range Electronic Interactions at High Temperature: Bromine Adatom Islands on Cu{111}, S. U. Nanayakkara, E. C. H. Sykes, L. C. Fernandez-Torres, M. M. Blake, and P. S. Weiss, Physical Review Letters 98, 206108 (2007).
3. Analyzing the Motion of Benzene on Au{111}: Single Molecule Statistics from Scanning Probe Images, B. A. Mantooth, E. C. H. Sykes, P. Han, A. M. Moore, Z. J. Donhauser, V. H. Crespi, and P. S. Weiss, Journal of Physical Chemistry C 111, 6167 (2007).
4. Molecular Engineering of the Polarity and Interactions of Molecular Electronic Switches, P. A. Lewis, C. E. Inman, F. Maya, J. M. Tour, J. E. Hutchison, and P. S. Weiss, Journal of the American Chemical Society 127, 17421 (2005).
5. Molecular Engineering and Measurements to Test Hypothesized Mechanisms in Single-Molecule Conductance Switching, A. M. Moore, A. A. Dameron, B. A. Mantooth, R. K. Smith, D. J. Fuchs, J. W. Ciszek, F. Maya, Y. Yao, J. M. Tour, and P. S. Weiss, Journal of the American Chemical Society 128, 1959 (2006).
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
Paul S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
We use molecular design, tailored syntheses, intermolecular interactions and selective chemistry to direct molecules into desired positions to create nanostructures, to connect functional molecules to the outside world, and to serve as test structures for measurements of single or bundled molecules. Interactions within and between molecules can be designed, directed, measured, understood and exploited at unprecedented scales. We look at how these interactions influence the chemistry, dynamics, structure, electronic function and other properties. Such interactions can be used to advantage to form precise molecular assemblies, nanostructures, and patterns, and to control and to stabilize function. These nanostructures can be taken all the way down to atomic-scale precision or can be used at larger scales. We select and tailor molecules to choose the intermolecular interaction strengths and the structures formed within the film. We employ some of these approaches in directed assembly to enable bioselective and biospecific binding. We also selectively test hypothesized mechanisms for electronic switching by varying molecular design, chemical environment, and measurement conditions to enable or to disable functions and control of these molecules with predictive and testable means. Critical to understanding these variations has been developing the means to make tens to hundreds of thousands of independent single-molecule measurements in order to develop sufficiently significant statistical distributions, comparable to those found in ensemble-averaging measurements, while retaining the heterogeneity of the measurements. We quantitatively compare the conductances of molecule-substrate junctions. We demonstrate the importance of these junctions in conductance switching of single molecules. We now apply these strategies to photo-driven, electrochemically-driven, and chemically-driven motion in single molecules and assemblies. This enables us to address how concerted nano-scale motions can be used to drive motion at larger scales. The atomic-scale details provide surprising and useful insights into the limitations and opportunities of cooperative motion.
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
Paul S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
Paul S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
P. S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
Designing, Measuring and Controlling Molecular- and Supramolecular-Scale Properties for Molecular Devices
P. S. Weiss, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, PA 16802-6300, USA
American Chemical Society & Affiliated Meetings -- the Next 10 Years.
Next ACS Meeting, New Orleans, LA, USA, Sunday 6 - Thursday 10 April 2008.
American Physical Society
& Affiliated Meetings this year or future years, the main (March) meeting is in March (surprise!) each year.
Next APS March meeting, 16-20 March 2009, Pittsburgh, PA, USA.
American Vacuum Society National
Symposium is in October or November each year.
Next AVS Meeting, 19-24 October 2008, Boston, MA, USA.
2008 AVS Meeting, Seattle, WA, USA, October 2008.
AVS-related Meetings.
Faraday Discussions of the Chemical Society
The Federation of Analytical Chemistry and Spectroscopy Societies (FACSS) Meeting
Foundations of Nanoscience Meetings are held in Snowbird, Utah every April.
Next meeting: April 2008, Snowbird, Utah.
Materials Research Society Meetings.
Fall in Boston. Spring in San Francisco.
Physical Electronics Conference
58th Annual Physical Electronics Conference held in 1998 at Penn State.
PittCon Meetings
PittCon
Next meeting: Chicago, IL, USA, March 2009.
STM/NANO Meetings
Most recent meeting: STM '08 and Nano 10, 20-25 July 2008, Keystone, CO.
Scientific Programme at the International Centre for Theoretical Physics, Trieste, Italy.
The Foresight Conferences on Molecular Nanotechnology.
Engineering Foundation Conferences
Chemical and Engineering News' List of Meetings
American Physical Society's List of Meetings
European Physics Society's List of Meetings
Materials Research Society's List of Meetings
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15 May 2008