TR 33. Design, Operation, and Housing of an Ultrastable, Low Temperature, Ultrahigh Vacuum Scanning Tunneling Microscope, J. H. Ferris, J. G. Kushmerick, J. A. Johnson, R. B. Kessinger, H. F. Kingsbury, M. G. Yoshikawa Youngquist, and P. S. Weiss, Review of Scientific Instruments 69 (1998), in press.

TR 34. Creating, Tailoring and Using One-Dimensional Interfaces in Two-Dimensional Films, P. S. Weiss, H. Yokota, R. Aebersold, G. van den Engh, L. A. Bumm, J. J. Arnold, T. D. Dunbar, and D. L. Allara, manuscript in prepration for Journal of Physics: Condensed Matter 10 (1998), in press. (ABSTRACT)

TR 35. Directed Self-Assembly to Create Molecular Terraces with Molecularly Sharp Boundaries in Organic Monolayers, L. A. Bumm, J. J. Arnold, T. D. Dunbar, D. L. Allara, and P. S. Weiss, submitted for publication. (ABSTRACT)

TR 36. Electron Transport through Organic Molecules, L. A. Bumm, J. J. Arnold, T. D. Dunbar, D. L. Allara, and P. S. Weiss, submitted for publication. (ABSTRACT)

TR 38. Probing Electronic Properties of Conjugated and Saturated Molecules in Self-Assembled Monolayers, P. S. Weiss, L. A. Bumm, T. D. Dunbar, T. P. Burgin, J. M. Tour, and D. L. Allara, Annals of the New York Academy of Sciences 852 (June 30, 1998), in press. Collaborative work with the University of South Carolina.

TR 39. Evolution of Strategies for Self-Assembly and Hookup of Molecule-Based Devices, D. L. Allara, T. D. Dunbar, P. S. Weiss, L. A. Bumm, M. T. Cygan, J. M. Tour, T. P. Burgin, L. Jones, II, Annals of the New York Academy of Sciences 852 (June 30, 1998), in press. Collaborative work with the University of South Carolina.

TR 41. Strong Electronic Perturbation of the Cu{111} Surface by 7,7',8,8'-Tetracyanoquinonedimethane,M. M. Kamna, T. M. Graham, and P. S. Weiss, submitted for publication.

TR 42. Mobile Promoters on Anisotropic Catalysts: Ni on MoS₂, J. G. Kushmerick and P. S. Weiss, submitted for publication. (ABSTRACT)

TR 43. Molecular Motion to Step Edges, J. H. Ferris, J. G. Kushmerick, and P. S. Weiss, submitted for publication. (ABSTRACT)

TR 31. Imaging Benzene and Phenyl on Cu{111}, P. S. Weiss, M. M. Kamna, T. M. Graham, and S. J. Stranick, Langmuir 14, 1284 (1998). (ABSTRACT)

TR 32. Insertion, Conductivity, and Structures of Single and Bundled Conjugated Organic Oligomers in Self-Assembled Alkanethiol Monolayers on Au{111}, M. T. Cygan, L. A. Bumm, J. J. Arnold, N. F. Shedlock, T. D. Dunbar, T. Burgin, D. L. Allara, J. M. Tour, and P. S. Weiss, Journal of the American Chemical Society 120, 2721 (1998). Collaborative work with the University of South Carolina and DARPA. (ABSTRACT)

None.

None.

TR 37. Self-Assembled Monolayer Formation of Organoselenium Compounds on Gold and its Significance for Molecular Scale Electronics, W. A. Reinerth, T. P. Burgin, T. D. Dunbar, L. A. Bumm, J. J. Arnold, J. J. Jackiw, C. Zhou, M. R. Deshpande, D. L. Allara, P. S. Weiss, M. A. Reed, and J. M. Tour, Proceedings of Polymer Materials, Science, and Engineering (American Chemical Society, Division of Polymer Materials Science and Engineering) 78, 178 (1998). Unrefereed paper. Collaborative work with the University of South Carolina.

TR 40. Ring-Opening Metathesis Polymerization from Surfaces, M. Weck, J. J. Jackiw, P. S. Weiss, and R. H. Grubbs, Polymer Preprints (American Chemical Society, Division of Polymer Chemistry), in press. Unrefereed paper. Collaborative work with Cal Tech.

None.

None.

JASON, "Genomic Technologies," P. S. Weiss, La Jolla, CA, July 3, 1997.

Eighth International Conference on Organized Molecular Films, "Control of the Structure and Properties of Self-Assembled Monolayers," P. S. Weiss, Pacific Grove, CA, August 24-29, 1997.

214^th Meeting of the American Chemical Society, "Patterning Molecules on the Nanometer Scale," P. S. Weiss, J. J. Arnold, L. A. Bumm, L. F. Charles, M. T. Cygan, T. D. Dunbar, and D. L. Allara, Las Vegas, NV, September 8, 1997.

214^th Meeting of the American Chemical Society, "Combining IR Spectroscopy and STM for Probing Inserted Molecules in Monolayer Assemblies," D. L. Allara, P. S. Weiss, T. D. Dunbar, M. T. Cygan, J. Arnold and L. A. Bumm, Las Vegas, NV, September 10, 1997. Presented by D. L. Allara.

International Workshop on Surface Chemistry on the Nanoscopic Scale, "Natural and Artificial Means of Controlling Molecules on Surfaces," P. S. Weiss, Oegstgeest, The Netherlands, September 13, 1997.

International Conference on Molecular Electronics -- Science and Technology, "Electron Transport through Organic Molecules Isolated or Organized in Monomolecular Films" P. S. Weiss, Palmas del Mar, Puerto Rico, December 15, 1997.

International Conference on Molecular Electronics -- Science and Technology, "Strategies for Self-Assembly And Hookup of Molecule-Based Devices" D. L. Allara, T. Dunbar, P. S. Weiss, L. A. Bumm, M. T. Cygan, Palmas del Mar, Puerto Rico, December 16, 1997.

Society of Analytical Chemists of Pittsburgh, Pittsburgh, "Single Molecules in Chemistry and Biology" P. S. Weiss, Philadelphia, PA, January 12, 1998.

DARPA Workshop on the Status and Future of Molecular Electronics, "Probing Molecular Electronics and Photonics at the Nanometer Scale: Capabilities and Directions," P. S. Weiss, Reston, VA, February 3, 1998.

American Association for the Advancement of Science Annual Meeting and Science Innovation Symposium, "Manipulating and Probing Single Molecules in Chemistry, Physics, and Bioogy," Philadelphia, PA, P. S. Weiss, Philadelphia, PA, February 13, 1998.

215^th Meeting of the American Chemical Society, "Patterning Molecules on the Nanometer Scale," P. S. Weiss, J. J. Arnold, L. A. Bumm, L. F. Charles, M. T. Cygan, T. D. Dunbar, and D. L. Allara, Dallas, TX, March 30, 1998.

1997 Annual Joint Symposium of the Delaware Valley and Greater New York Chapters of the American Vacuum Society, "Transient Mobility and Step Edge Effects on Benzene Adsorption on Ni{110}," J. H. Ferris, J. G. Kushmerick, J. A. Johnson, and P. S. Weiss, Piscataway, NJ, June 4, 1997. Poster presented by J. H. Ferris.

57^th Annual Conference on Physical Electronics, "Interactions and Dynamics of Adsorbed Aromatic Molecules and Radicals," P. S. Weiss, M. M. Kamna, and T. M. Graham, Eugene, OR, June 20, 1997.

STM'97, 9^th International Conference on Scanning Tunneling Microscopy, "Imaging Adsorbed and Their Interactions with Scanning Tunneling Microscopy," M. M. Kamna, T. M. Graham, and P. S. Weiss, July 22, 1997, Hamburg, Germany. Poster.

STM'97, 9^th International Conference on Scanning Tunneling Microscopy, "Imaging and Probing Self-Assembled Monolayers and Molecules Inserted in These Organic Films," L. A. Bumm, J. J. Arnold, M. T. Cygan, J. D. Shore, L. F. Charles, T. D. Dunbar, D. L. Allara, L. Jones, T. P. Burgin, J. M. Tour, and P. S. Weiss, July 23, 1997, Hamburg, Germany.

James H. Ferris
Dorothy M. Hoffman Vacuum Education Award, 2^nd Prize, 1997.

Paul S. Weiss
John Simon Guggenheim Memorial Fellowship.
Visiting Professor, Department of Molecular Biotechnology, University of Washington.
NSF Creativity Award.
Visiting Professor, Department of Electrical Engineering, Kyoto University.

Date: September 1, 1991 - August 31, 1997.
Title: Presidential Young Investigator Award.
Agency: National Science Foundation.
Amount: $312,500.

Date: September 15, 1994 - October 31, 1997.
Title: Surface Chemistry and Spectroscopy: From Model to Real Systems.
Agency: National Science Foundation. Includes supplements.
Amount: $333,500.

Date: June 1, 1993 - May 31, 1998.
Title: Molecular Surface Chemistry.
Agency: National Science Foundation.
Amount: $555,000.
Participation: D. L. Allara, B. J. Garrison, M. J. Natan, P. S. Weiss and N. Winograd are co-principal investigators.

Date: September 15, 1994 - October 31, 1999.
Title: Surface Chemistry and Spectroscopy: From Model to Real Systems.
Agency: National Science Foundation. Includes supplements and Creativity Award Extension.
Amount: $633,500.

Date: September 1, 1995 - August 31, 1997.
Title: Alfred P. Sloan Foundation Fellowship.
Agency: Alfred P. Sloan Foundation.
Amount: $30,000.

Date: November 1, 1996 - October 31, 1997.
Title: Scanning Tunneling Microscopy.
Agency: Exxon Education Foundation.
Amount: $7,500.

Date: October 1, 1996 - September 30, 1997
Title: Acquisition of an Atomic Force Microscope for Analysis of Inorganic, Organic, and Biological Surface Structures.
Agency: National Science Foundation.
Amount: $96,983
Participation: Co-investigator with four others.

Date: April 1, 1997 - August 31, 1999.
Title: The Chemistry of Catalyst Surfaces.
Agency: Petroleum Research Fund administered by the American Chemical Society.
Amount: $55,000.

EOY Report - PART II

• a. Principal Investigator
  Paul S. Weiss

• b. Current telephone number
  (814) 865-3693 voice
  (814) 863-8081 fax

• c. Cognizant ONR Program Officer
  Dr. John C. Pazik

• d. Program objective
  

  The objective of this program is to examine the electronic and physico-chemical properties, the stability, and the dynamics of nanometer-scale structures and of components that may be used in such structures. These structures and components may play key roles in evolving or even revolutionizing devices for communications, sensors, and detectors. Our understanding of these structures is developed using unique scanning tunneling microscopy instrumentation which gives us the ability to work at low temperatures, to manipulate surface structures, and to work at microwave frequencies. We collaborate with key developers of molecules, films, and devices to screen and to advance the properties of the components, structures, and films they create.

• e. Most significant results during the last year

  We have developed new means to control the composition, structure, and properties of a monolayer. This includes developing new films with fewer and more regular/consistent insertion positions. This also includes growing variable length surface tethers from inserted molecules. In all cases the films are probed with scanning tunneling microscopy to ensure that our proposed structures actually exist on the surface.
  

• f. Brief summary of plans for next year's work

  We will continue to examine the electronic properties of a variety of molecules to understand the effects of varying functional groups, surface attachment, backbone identity and substitution, etc. We have made preliminary measurements of all of these substitutions. We will also continue to expand the repertoire of molecular-scale controls of surface structure and properties.

• g. List of names of graduate students and post-doctoral(s) currently working on the project

  Lyndon F. Charles
  Jennifer J. Jackiw
  Greg S. McCarty
  Dr. Lloyd A. Bumm
  

EOY Report - PART III

• a. An introductory 5 - Part Viewgraph (or full size GIF version)
  The position of molecules within monolayers is directed through film processing, defect selection and creation, and specific insertion. New probes are developed for atomic-scale spectroscopies to determine the identity, environment, properties of single and bundled molecules, nanoparticles, and molecular-scale device components. Electronic, vibrational, and optical information are all obtainable.
  
  

• b. Supporting viewgraph #1 (or full size GIF version)
  An example of an inserted structure is the variable length tethers grown from living polymers. Insertion of a stem through the monolayer is followed by polymerization of the surface-bound norbornene. The polymerization can be timed to yield a tether of a desired length. The initial isolated inserted molecules as well as the tether polymers are imaged. This work was done collaboratively with the Grubbs group from Cal Tech using the insertion method we developed, their polymers and catalysts, and our STMs to probe the results. Marcus Weck visited our labs for these measurements.
  
  
• c. Supporting viewgraph #2 (or full size GIF version)
  One of the spectroscopies we have developed allows us to record the optical spectrum of a single molecule or nanoparticle. Photon emission rates of up to 10⁶/sec have been recorded. We can determine the bias voltage thresholds of the photon emission. Other spectroscopies developed allow us to record vibrational spectra of single molecules, microwave spectra, and high frequency conductivity measurements.
  

• a. Number of papers submitted to refereed journals, but not published: 9
  
• b. + Number of papers published in refereed journals: 2
  
• c. + Number of books or chapters submitted, but not yet published: 0
  
• d. + Number of books or chapters published: 0
  
• e. + Number of printed technical reports/non-refereed papers: 2
  
• f. Number of patents filed: 0
  
• g. + Number of patents granted: 0
  
• h. + Number of invited presentations: 11
  
• i. + Number of submitted presentations: 4
  
• j. + Honors/Awards/Prizes for contract/grant employees: 5
  
• k. Total number of Full-time equivalent Graduate Students and Post-Doctoral associates supported during this period, under this R&T project number: 3
  
  • Graduate Students: 2
  • Post-Doctoral Associates: 1
  • including the number of,
    • Female Graduate Students: 1
    • Female Post-Doctoral Associates: 0
    • Minority* Graduate Students: 0.5
    • Minority* Post-Doctoral Associates: 0
    • Asian Graduate Students: 0
    • Asian Post-Doctoral Associates: 0
      

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