Robert Freitas has been involved in a lot of important work towards achieving molecular nanotechnology from a recent important computational chemistry study and paper to the Nanofactory collaboration
From the nanofactory collaboration site they have announced books, experiments and papers that are being worked upon.
Berhane Temelso, C. David Sherrill, Ralph C. Merkle, Robert A. Freitas Jr., “High-level Ab Initio Studies of Hydrogen Abstraction from Prototype Hydrocarbon Systems,” J. Phys. Chem. A (2006). In press.
I believe this paper will be providing more computational study of the 1991 hydrogen abstraction tool and other follow on tools.
More on ab initio quantum chemistry methods at another wikipedia article.
Robert A. Freitas Jr., Damian G. Allis, Ralph C. Merkle, “Horizontal Ge-Substituted Polymantane-Based C2 Dimer Placement Tooltip Motifs for Diamond Mechanosynthesis,” J. Comput. Theor. Nanosci. 3(2006). In final preparation.
Follow on to the important computational chemistry study mentioned at the start of this article.
Berhane Temelso, C. David Sherrill, Ralph C. Merkle, Robert A. Freitas Jr., “High-level Ab Initio Studies of Prototype Hydrogen Donation Tools,” J. Phys. Chem. A (2007). In preparation.
More detailed computational analysis of important tools.
Robert A. Freitas Jr., Ralph C. Merkle, “A Minimal Toolset for Positional Diamond Mechanosynthesis,” J. Comput. Theor. Nanosci. 3(2007). In preparation.
An important theoretical paper that will overview the lower threshhold of what is needed for diamond mechnosynthesis.
Robert A. Freitas Jr., Ralph C. Merkle, Diamond Surfaces and Diamond Mechanosynthesis, Landes Bioscience, 2007, in preparation; http://www.MolecularAssembler.com/DSDM.htm
This will be an important book that will gather a lot of the recent theoretical, computational and experimental work together. Probably good for advanced university classes.
Robert A. Freitas Jr., J. Storrs Hall, Fundamentals of Nanomechanical Engineering, 2007-2008, in preparation; http://nanomech.org/ is currently sparse and points mainly to the molecularassembler.com
A book that will provide an updated overview of nanomechanics. I believe it will probably become the new main book for university level classes.