2016 - 2020

Thrift, W. J., Ronaghi, S., Samad, M., Wei, H., Nguyen, D. G., Cabuslay, A. S., Groome, C. E., Santiago, P. J., Baldi, P., Hochbaum, A. I., & Ragan, R. (2020). Deep Learning Analysis of Vibrational Spectra of Bacterial Lysate for Rapid Antimicrobial Susceptibility Testing. ACS Nano, 14(11), 15336–15348.

George, D., Garcia, A., Pham, Q., Perez, M. R., Deng, J., Nguyen, M. T., Zhou, T., Martinez-Chapa, S. O., Won, Y., Liu, C., Lo, R. C., Ragan, R., & Madou, M. (2020). Fabrication of patterned graphitized carbon wires using low voltage near-field electrospinning, pyrolysis, electrodeposition, and chemical vapor deposition. Microsystems & Nanoengineering, 6(1), 7.

Thrift, W. J., & Ragan, R. (2019). Quantification of Analyte Concentration in the Single Molecule Regime Using Convolutional Neural Networks. Analytical Chemistry, 91(21), 13337–13342.

Thrift, W. J., Cabuslay, A., Laird, A. B., Ranjbar, S., Hochbaum, A. I., & Ragan, R. (2019). Surface-Enhanced Raman Scattering-Based Odor Compass: Locating Multiple Chemical Sources and Pathogens. ACS Sensors, 4(9), 2311–2319.

Darvishzadeh-Varcheie, M., Thrift, W. J., Kamandi, M., Ragan, R., & Capolino, F. (2019). Two-Scale Structure for Giant Field Enhancement: Combination of Rayleigh Anomaly and Colloidal Plasmonic Resonance. Physical Review Applied, 11(5), 054057.

Garcia, A. E., Wang, C. S., Sanderson, R. N., McDevitt, K. M., Zhang, Y., Valdevit, L., Mumm, D. R., Mohraz, A., & Ragan, R. (2019). Scalable synthesis of gyroid-inspired freestanding three-dimensional graphene architectures. Nanoscale Advances, 1(10), 3870–3882.

Holmberg, S., Ghazinejad, M., Cho, E., George, D., Pollack, B., Perebikovsky, A., Ragan, R., & Madou, M. (2018). Stress-activated pyrolytic carbon nanofibers for electrochemical platforms. Electrochimica Acta, 290, 639–648.

Wang, C. S., Wang, H., Wu, R., & Ragan, R. (2018). Evaluating the Stability of Single-Atom Catalysts with High Chemical Activity. The Journal of Physical Chemistry C, 122(38), 21919–21926.

Nguyen, C. Q., Thrift, W. J., Bhattacharjee, A., Ranjbar, S., Gallagher, T., Darvishzadeh-Varcheie, M., Sanderson, R. N., Capolino, F., Whiteson, K., Baldi, P., Hochbaum, A. I., & Ragan, R. (2018). Longitudinal Monitoring of Biofilm Formation via Robust Surface-Enhanced Raman Scattering Quantification of Pseudomonas aeruginosa -Produced Metabolites. ACS Applied Materials & Interfaces, 10(15), 12364–12373.

Wang, C. S., Bartelt, N. C., Ragan, R., & Thürmer, K. (2018). Revealing the molecular structure of soot precursors. Carbon, 129537–542.

Neal, J. A., Oldenhuis, N. J., Novitsky, A. L., Samson, E. M., Thrift, W. J., Ragan, R., & Guan, Z. (2017). Large Continuous Mechanical Gradient Formation via Metal-Ligand Interactions. Angewandte Chemie International Edition, 56(49), 15575–15579.

Thrift, W. J., Nguyen, C. Q., Darvishzadeh-Varcheie, M., Zare, S., Sharac, N., Sanderson, R. N., Dupper, T. J., Hochbaum, A. I., Capolino, F., Abdolhosseini Qomi, M. J., & Ragan, R. (2017). Driving Chemical Reactions in Plasmonic Nanogaps with Electrohydrodynamic Flow. ACS Nano, 11(11), 11317–11329.

Darvishzadeh-Varcheie, M., Guclu, C., Ragan, R., Boyraz, O., & Capolino, F. (2016). Electric field enhancement with plasmonic colloidal nanoantennas excited by a silicon nitride waveguide. Optics Express, 24(25), 28337.

Zhao, Q., Guclu, C., Huang, Y., Capolino, F., Ragan, R., & Boyraz, O. (2016). Plasmon optical trapping using silicon nitride trench waveguides. Journal of the Optical Society of America B, 33(6), 1182.

Sharac, N., Sharma, H., Veysi, M., Sanderson, R. N., Khine, M., Capolino, F., & Ragan, R. (2016). Tunable optical response of bowtie nanoantenna arrays on thermoplastic substrates. Nanotechnology, 27(10), 105302.


2006 - 2015

Cho, S. K., Dang, C., Wang, X., Ragan, R., & Kwon, Y. J. (2015). Mixing-sequence-dependent nucleic acid complexation and gene transfer efficiency by polyethylenimine. Biomaterials Science, 3(7), 1124–1133.

Wang, X., Sanderson, R. N., & Ragan, R. (2014). Evaluation of Young’s Modulus of Tethered 1-Palmitoyl-2-oleoyl- sn -glycero-3-phosphocholine Membranes Using Atomic Force Spectroscopy. The Journal of Physical Chemistry C, 118(50), 29301–29309.

Jabaiah, A., Wang, X., Raman, S. K., Ragan, R., Da Silva, N. A., & Wang, S.-W. (2014). Nanoscale architecture and cellular adhesion of biomimetic collagen substrates. Journal of Biomaterials Applications, 28(9), 1354–1365.

Campione, S., Guclu, C., Ragan, R., & Capolino, F. (2014). Enhanced Magnetic and Electric Fields via Fano Resonances in Metasurfaces of Circular Clusters of Plasmonic Nanoparticles. ACS Photonics, 1(3), 254–260.

Campione, S., Guclu, C., Ragan, R., & Capolino, F. (2013). Fano resonances in metasurfaces made of linear trimers of plasmonic nanoparticles. Optics Letters, 38(24), 5216.

Upadhyay, A. P., Behara, D. K., Sharma, G. P., Bajpai, A., Sharac, N., Ragan, R., Pala, R. G. S., & Sivakumar, S. (2013). Generic Process for Highly Stable Metallic Nanoparticle-Semiconductor Heterostructures via Click Chemistry for Electro/Photocatalytic Applications. ACS Applied Materials & Interfaces, 5(19), 9554–9562.

Quitoriano, N. J., Sanderson, R. N., Bae, S.-S., & Ragan, R. (2013). Interpreting Kelvin probe force microscopy under an applied electric field: Local electronic behavior of vapor–liquid–solid Si nanowires. Nanotechnology, 24(20), 205704.

Cho, S. K., Wang, X., Ragan, R., & Kwon, Y. J. (2013). 163. When Nucleic Acids Meet Cationic Polymers: Effects of Mixing Sequence on Complexation and Transfection Efficiencies. Molecular Therapy, 21, S65.

Campione, S., Adams, S. M., Ragan, R., & Capolino, F. (2013). Comparison of electric field enhancements: Linear and triangular oligomers versus hexagonal arrays of plasmonic nanospheres. Optics Express, 21(7), 7957.

Adams, S. M., Campione, S., Capolino, F., & Ragan, R. (2013). Directing Cluster Formation of Au Nanoparticles from Colloidal Solution. Langmuir, 29(13), 4242–4251.

Nawarathna, D., Norouzi, N., McLane, J., Sharma, H., Sharac, N., Grant, T., Chen, A., Strayer, S., Ragan, R., & Khine, M. (2013). Shrink-induced sorting using integrated nanoscale magnetic traps. Applied Physics Letters, 102(6), 063504.

Bae, S.-S., Prokopuk, N., Quitoriano, N. J., Adams, S. M., & Ragan, R. (2012). Characterizing defects and transport in Si nanowire devices using Kelvin probe force microscopy. Nanotechnology, 23(40), 405706.

Adams, S. M., Campione, S., Caldwell, J. D., Bezares, F. J., Culbertson, J. C., Capolino, F., & Ragan, R. (2012). Non-lithographic SERS Substrates: Tailoring Surface Chemistry for Au Nanoparticle Cluster Assembly. Small, 8(14), 2239–2249.

Wang, X., Shindel, M. M., Wang, S.-W., & Ragan, R. (2012). Elucidating Driving Forces for Liposome Rupture: External Perturbations and Chemical Affinity. Langmuir, 28(19), 7417–7427.

Ouyang, W., Shinde, A., Zhang, Y., Cao, J., Ragan, R., & Wu, R. (2011). Structural and Chemical Properties of Gold Rare Earth Disilicide Core−Shell Nanowires. ACS Nano, 5(1), 477–485.

Wang, X., Shindel, M. M., Wang, S.-W., & Ragan, R. (2010). A Facile Approach for Assembling Lipid Bilayer Membranes on Template-Stripped Gold. Langmuir, 26(23), 18239–18245.

Shim, M. S., Wang, X., Ragan, R., & Kwon, Y. J. (2010). Dynamics of nucleic acid/cationic polymer complexation and disassembly under biologically simulated conditions using in situ atomic force microscopy. Microscopy Research and Technique, 73(9), 845–856.

Shinde, A., Wu, R., & Ragan, R. (2010). Thermodynamic driving forces governing assembly of disilicide nanowires. Surface Science, 604(17–18), 1481–1486.

Shinde, A., Cao, J., Ouyang, W., Wu, R., & Ragan, R. (2009). Determination of preferential rare earth adatom adsorption geometries on Si(001). Physics Letters A, 373(38), 3459–3463.

Choi, J. H., Adams, S. M., & Ragan, R. (2009). Design of a versatile chemical assembly method for patterning colloidal nanoparticles. Nanotechnology, 20(6), 065301.

Lee, S., Shinde, A., & Ragan, R. (2009). Morphological work function dependence of rare-earth disilicide metal nanostructures. Nanotechnology, 20(3), 035701.

Shinde, A., Cao, J., Lee, S., Wu, R., & Ragan, R. (2008). An atomistic view of structural and electronic properties of rare earth ensembles on Si(001) substrates. Chemical Physics Letters, 466(4–6), 159–164.

Shinde, A., Cao, J., Wu, R., & Ragan, R. (2008). Structural Understanding of Self-Assembled Rare Earth Disilicide Nanostructures Via Scanning Probe Microscopy and First Principles Studies. Israel Journal of Chemistry, 48(2), 73–79.

Lee, S., Bae, S.-S., Medeiros-Ribeiro, G., Blackstock, J. J., Kim, S., Stewart, D. R., & Ragan, R. (2008). Scanning Tunneling Microscopy of Template-Stripped Au Surfaces and Highly Ordered Self-Assembled Monolayers. Langmuir, 24(12), 5984–5987.

Jo, C., Cao, J., Shinde, A., Ragan, R., & Wu, R. (2008). First principles studies of adsorption of Pd, Ag, Pt, and Au on yttrium disilicide nanowires. Chemical Physics Letters, 454(4–6), 327–331.

Lim, D. K., Lee, D., Lee, H., Bae, S.-S., Choi, J., Kim, S., Ji, C., Ragan, R., Ohlberg, D. A. A., Chang, Y. A., & Williams, R. S. (2007). Structure and electronic properties of self-assembled Pt silicide nanowires on Si(100). Nanotechnology, 18(9), 095706.

You, J. P., Choi, J. H., Kim, S., Li, X., Williams, R. S., & Ragan, R. (2006). Regular Arrays of Monodisperse Platinum/Erbium Disilicide Core−Shell Nanowires and Nanoparticles on Si(001) via a Self-Assembled Template. Nano Letters, 6(9), 1858–1862.

Ragan, R., Guyer, J. E., Meserole, E., Goorsky, M. S., & Atwater, H. A. (2006). Kinetics governing phase separation of nanostructured Sn x Ge 1 − x alloys. Physical Review B, 73(23), 235303.

Lee, S., Park, J., Ragan, R., Kim, S., Lee, Z., Lim, D. K., Ohlberg, D. A. A., & Williams, R. S. (2006). Self-Assembled Monolayers on Pt(111): Molecular Packing Structure and Strain Effects Observed by Scanning Tunneling Microscopy. Journal of the American Chemical Society, 128(17), 5745–5750.


Before 2006

Google Scholar

Research Gate



Metasurfaces Comprised of Nanosphere Oligomers with Uniform Narrow Gap Spacings, Their Method of Fabrication and Applications in Sensing.

Ragan, R., Capolino, F., Thrift, W. J. (2019). US20190064074A1.

Surfaces having nanoparticulate layers and assembly and use thereof.

Ragan, R., Sivakumar, S., Pala, R. G. S., Upadhyay, A. P. (2015). US20150065688A1.