@article{santagata_lakhani_davis_luo_nardelli_pearl_2010, title={Chiral Steering of Molecular Organization in the Limit of Weak Adsorbate-Substrate Interactions: Enantiopure and Racemic Tartaric Acid Domains on Ag(111)}, volume={114}, ISSN={["1932-7447"]}, DOI={10.1021/jp912124v}, abstractNote={The influence of intermolecular interactions involving molecular chiral centers on two-dimensional organization in the limit of a weak adsorbate−surface interaction has been studied with low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT). A model system composed of a chiral organic molecule, tartaric acid, and an inert metallic surface, Ag(111), was employed. Dual component films formed from the serial deposition of (S,S)- and (R,R)-tartaric acid enantiomers onto this surface exhibit homochiral domain formation as revealed by molecularly resolved STM images. In contrast, a unique tartaric acid enantiomeric heteropair is experimentally and computationally verified as the basis unit of films formed via the deposition of both enantiomers simultaneously from a racemic (1:1) mixture. The molecular adsorption geometry relative to the Ag(111) lattice in both enantiomerically pure and racemic domains is determined primarily by the interaction of chiral centers between nearest ...}, number={19}, journal={JOURNAL OF PHYSICAL CHEMISTRY C}, author={Santagata, Nancy M. and Lakhani, Amit M. and Davis, Bryce F. and Luo, Pengshun and Nardelli, Marco Buongiorno and Pearl, Thomas P.}, year={2010}, month={May}, pages={8917–8925} }
 @article{santagata_luo_lakhani_dewitt_day_norton_pearl_2008, title={Organizational structure and electronic decoupling of surface bound chiral domains and biomolecules}, volume={8}, ISSN={["1558-1748"]}, DOI={10.1109/JSEN.2008.923187}, abstractNote={For the development of reagentless biological and chemical species detection at the single molecule level using external fields, including terahertz radiation, it is paramount to study model systems that uncover how intermolecular and molecule-surface interactions dictate monolayer ordering and electronic properties. This paper addresses two types of molecule-surface interactions and two distinct molecular systems, both of which impact our fundamental understanding of confined molecular domains and single molecule detection. We will first discuss the ordering and electronic characteristics of a chiral molecule, tartaric acid , weakly bound to an achiral metal surface, Ag(111), as studied with low temperature scanning tunneling microscopy (STM). This particular molecule-surface system contains many key elements, including hydrogen bonding interactions and stereochemical features, that would be common to other functional detection schemes. This paper will also treat the characterization of isolated, thiolated DNA molecules chemically bound to Au(111) terraces. Ambient STM and atomic force microscopy (AFM) measurements of both short and long DNA structures in both single and double strand configurations will be discussed with particular attention paid to imaging mechanisms involved. These results are particularly relevant to systems involving biomolecules anchored to inert metal surfaces, such as those used in external field-based assays.}, number={5-6}, journal={IEEE SENSORS JOURNAL}, author={Santagata, Nancy M. and Luo, Pengshun and Lakhani, Amit M. and DeWitt, Darryl J. and Day, B. Scott and Norton, Michael L. and Pearl, Thomas P.}, year={2008}, pages={758–766} }
 @inproceedings{santagata_lakhani_dewitt_luo_pearl_2008, title={Probing molecular-level organizational structure and electronic decoupling of tartaric acid domains supported on Ag(111)}, volume={100}, booktitle={Proceedings of the 17th international vacuum congress/13th international conference on surface science/international conference on nanoscience and technology}, author={Santagata, N. M. and Lakhani, A. M. and DeWitt, D. J. and Luo, P. and Pearl, T. P.}, year={2008} }
 @article{lakhani_dewitt_sant'agata_pearl_2007, title={Persistence of chirality for a weakly bound adsorbate: (R,R)- and (S,S)-tartaric acid/Ag(111)}, volume={111}, ISSN={["1932-7447"]}, DOI={10.1021/jp068639y}, abstractNote={The interaction of tartaric acid (C4H6O6), including both (R,R) and (S,S) enantiomers, with Ag(111) has been studied using low-energy electron diffraction (LEED) and low-temperature scanning tunneling microscopy (STM). As evidenced by both diffraction and microscopy, this molecule binds very weakly to the Ag lattice, and the interadsorbate forces strongly dictate the formation of ordered monolayers that are globally chiral. In addition to a discussion of the role that hydrogen bonding plays in the formation of monolayer domains, comparisons of this system to the growth of tartaric acid on other metallic surfaces will be made.}, number={15}, journal={JOURNAL OF PHYSICAL CHEMISTRY C}, author={Lakhani, A. M. and DeWitt, D. J. and Sant'Agata, N. M. and Pearl, T. P.}, year={2007}, month={Apr}, pages={5750–5755} }