Ram Rajagopalan

PUBLICATIONS

2022

  • Hamedi, H., Walker, R.C., Woodward, W.H.H., Rajagopalan, R., Furman, E., Lanagan, M.T. (2022), Transient behavior of electrical conductivity in low density polyethylene in the presence of acetophenone, Journal of Applied Polymer Science, 139, 51881.
  • Zhu, Y., Iroh, J.O., Rajagopalan, R., Aykanat, A., Vaia, R. (2022), Optimizing the synthesis and thermal properties of conducting polymer-montmorillonite clay nanocomposites, Energies, 15, 1291.

2021

  • Seo, J.H., Fan, Z., Nakaya, H., Rajagopalan, R., Gomez, E.D., Iwasaki, M., Randall, C.A. (2021), Cold sintering, enabling a route to co-sinter an all solid-state battery. Japanese Journal of Applied Physics, 60, 037001.
  • Walker, R.C., Hamedi, H., Woodward, W.H.H., Rajagopalan, R., Lanagan, M. (2021), Impacts of crosslinking and degassing on the conductivity, dielectric loss and morphology of low-density polyethylene and crosslinked polyethylene. Broadband Dielectric Spectroscopy: A Modern Analytical technique, 239 -260.

2020

  • Sarkarat, M., Lanagan, M., Ghosh, D., Lottes, A., Budd, K., Rajagopalan, R. (2020), Improved thermal conductivity and AC dielectric breakdown strength of silicone rubber/BN composites. Composites, Part C., 2, 100023.
  • Seo, J.H., Nakaya, H., Takeuchi, Y., Fan, Z., Hikosaka, H., Rajagopalan, R., Gomez, E.D., Iwasaki, M., Randall, C.A. (2020),  Broad temperature dependence , high conductivity and structure-property relations of cold sintering of LLZO-based composite electrolytes. Journal of the European Ceramic Society, 40, 6241-6248.
  • Yuan, M., Zhang, G., Li, B., Chung, M., Rajagopalan, R., Lanagan, M.T., (2020), Thermally-stable low-loss polymer dielectrics enabled by attaching crosslinkable antioxidant to polypropylene. ACS Applied Materials & Interfaces, 12, 14154 – 14164.
  • Yuan, M., Li, B., Zhang, S., Rajagopalan, R., Lanagan, M.T., (2020), High-Field Dielectric Properties of Oriented Poly(vinylidene fluoride-co-hexafluoropropylene): Structure–Dielectric Property Relationship and Implications for Energy Storage Applications., ACS Applied Polymer Materials, 2,3, 1356 – 1368.
  • Sarkarat, M., Lanagan, M., Ghosh, D., Lottes, A., Budd, K., & Rajagopalan, R. (2020). High Field Dielectric Properties of Clay filled Silicone Rubber Composites. Materials Today Communications, 23, 100947.
  • Hasyim, M. R*., & Rajagopalan, R. (2020). Prediction of charge-discharge performance and impedance characteristics of coated pseudocapacitive materials on carbon electrode. Journal of the Electrochemical Society, 167(1), 013536.

2019

  • Misra, V., Bozkurt, A., Calhoun, B., Datta, S., Dickey, M., Kiani, M., Lach, J., Lee, B., Jur, J., Oralkan, O., Ozturk, M., Rajagopalan, R., Roundy, S., Strohmaier, J., Trolier-McKinstry, S., Vashaee, D., Wentzloff, D., & Werner, D. (2019). Optimizing the energy balance to achieve autonomous self-powering for vigilant health and IoT applications. Journal of Physics: Conference Series, 1407(1), 012001.
  • Yu, L., Fujisawa, K., Zhang, F., Briggs, N., Aref, A. R., Yeh, Y.-T., Lin, Z., Joshua, R. A., Rajagopalan, R., & Terrones, M. (2019). V-MoS2 alloy: a designed anode with improved electrical conductivity and high rate capacity for lithium storage. ACS Applied Energy Materials, 2(12), 8625-8632.
  • Seo, J.H., Verlinde, K., Rajagopalan, R., Gomez, E.D., Mallouk, T.E., Randall, C.A. (2019), Cold sintering process for fabrication of a high volumetric capacity Li4Ti5O12 anode, Materials Science and Engineering B, 250, 114435.
  • Aref, A.R., Chen, S.W.*, Rajagopalan, R., Randall, C.A. (2019), Bimodal porous carbon cathode and prelithiated carbon onion anode for ultrahigh power energy efficient lithium ion capacitors, Carbon, 152, 89 -97.
  • Yuan, M., Rajagopalan, R., Lanagan, M., Zhang, S. (2019), High electrical reliability glass-polymer laminates. IEEE Transactions on Dielectrics and Electrical Insulation, 26, 885 – 889.
  • Adu, K., Rajagopalan, R., Kaschalk, C.*, Randall, C.A. (2019). CNT Flexible membranes for energy storage and conversion systems. MRS Communications, 9, 670 -674.

2018

  • Nayir, S., Rajagopalan, R., & Randall, C. A. (2018). Cold Sintering of a Covalently Bonded MoS2/Graphite Composite as a High Capacity Li‐ion Electrode. Chemnanomat, 4, 1088–1094.
  • Li, B., Yuan, M., Rajagopalan, R., Zhang, S., Lanagan, M. (2018). Abnormal high voltage resistivity of polyvinylidene fluoride and implications for applications in high energy density film capacitors. Applied Physics Letters, 113(19), 193903.
  • Aref, A. R., Rajagopalan, R., & Randall, C. A. (2018). High voltage stability of ionic liquid based EDLC made using a bimodal porous carbon electrode. Chemelectrochem, 5(22), 3460–3467.
  • Aref, A. R., Chou, C., Rajagopalan, R., & Randall, C. A. (2018). Bimodal porous carbon electrodes derived from polyfurfuryl alcohol/phloroglucinol for ionic liquid based electrical double layer capacitors. Journal of Materials Research, 33, 1189–1198.
  • Abrahamson, J. P., Rajagopalan, R., & Van derwal, R. (2018). Porous (Swiss-Cheese) Graphite. C Journal of Carbon Research, 4(27).
  • Seo, J.-H., Verlinde, K.*, Guo, J., Heidary, D. S. B., Rajagopalan, R., Mallouk, T., Randall, C. (2018). Cold sintering approach to fabrication of high rate performance binderless LiFePO4 cathode with high volumetric capacity. Scripta Materialia, 146, 267-271.
  • Sohrabi Baba Heidary, D., Guo, J., Seo, J.-H., Guo, H., Rajagopalan, R., Randall, C.A. (2018). Microstructures and electrical properties of V2O5 and carbon-nanofiber composites fabricated by cold sintering process. Japanese Journal of Applied Physics, 57, 025702.

2017

  • Aref, A. R., Chou, C.-C.*, Rajagopalan, R., Randall, C. A. (2017). Bimodal porous carbon electrodes derived from polyfurfuryl alcohol/phloroglucinol for ionic liquid based electrical double layer capacitors. Journal of Materials Research, 1-10.
  • Adu, K. W., Ma, D.*, Wang, Y.*, Spencer, M.*, Rajagopalan, R., Wang, C.-Y., Randall, C. A. (2017). Flexible robust binder-free carbon nanotube membranes for solid state and microcapacitor application. Nanotechnology, 29(3), 035605.
  • Hasyim, M. R.*, Ma, D.*, Rajagopalan, R., Randall, C. A. (2017). Prediction of Charge-Discharge and Impedance Characteristics of Electric Double-Layer Capacitors Using Porous Electrode Theory. Journal of the Electrochemical Society, 164(13), A2899-A2913.
  • Seo, J.-H., Guo, J., Guo, H., Verlinde, K.*, Heidary, Damoon Sohrabi Baba, Rajagopalan, R., Randall, C. A. (2017). Cold sintering of a Li-ion cathode: LiFePO4-composite with high volumetric capacity. Ceramics international, 43(17).
  • Sarkarat, M., Rajagopalan, R., Zhang, S., Lanagan, M. T. (2017). Enhanced mechanical stability of high temperature ultra-thin glass/polymer composite dielectrics. Materials letters, 208, 10-13.
  • Spencer, M.*, Adu, K., Rajagopalan, R., Randall, C. (2017). High Power Interdigitated Carbon Nanotube Based Micro-Capacitors. MRS Advances, 2(7), 413-418.
  • Daubert, J. S., Wang, R., Ovental, J. S., Barton, H. F., Rajagopalan, R., Augustyn, V., Parsons, G. N. (2017). Intrinsic limitations of atomic layer deposition for pseudocapacitive metal oxides in porous electrochemical capacitor electrodes. Journal of Materials Chemistry A, 5 (25), 13086-13097.

2015

  • Qajar, A., Peer, M., Andalibi, M. R., Rajagopalan, R., Foley, H. (2015). Enhanced Ammonia Adsorption on Functionalized Nanoporous Carbons. Microporous and mesoporous materials, 218, 15-23.
  • Qajar, A., Holbrook, B., Rajagopalan, R., Peer, M., Davis, M., Mueller, K., Foley, H.C. (2015). Synthesis and Characterization of Boron Substituted Carbon Deposits on PFA-derived Carbon Substrates for Hydrogen Adsorption. Carbon, 89, 392-403.

2014

  • Peer, M., Qajar, A., Rajagopalan, R., Foley, H. (2014). Synthesis of carbon with bimodal porosity by simultaneous polymerization of furfuryl alcohol and phloroglucinol. Microporous and Mesoporous Materials, 196, 235–242.
  • Hu, C., Qu, W., Rajagopalan, R., Randall, C. A. (2014). Factors influencing high voltage performance of coconut char derived carbon based EDLC made using acetonitrile and propylene carbonate based electrolytes. Journal of Power Sources, 272, 90 – 99.
  • Qu, W., Dorjpalam, E., Rajagopalan, R., Randall, C. A. (2014). Role of Additives in Formation of Solid–Electrolyte Interfaces on Carbon Electrodes and their Effect on High-Voltage Stability. ChemSusChem, 7(4), 1162–1169.
  • Merritt, A. R., Rajagopalan, R., Carter, J. D. (2014). Synthesis of electro-active manganese oxide thin films by plasma enhanced chemical vapor deposition. Thin Solid Films, 556, 28–34.
  • Peer, M., Qajar, A., Rajagopalan, R., Foley, H. (2014). On the effects of confinement within a catalyst consisting of platinum embedded within nanoporous carbon for the hydrogenation of alkenes. Carbon, 66, 459–466.
  • Kalupson, J.*, Ma, D.*, Randall, C. A., Rajagopalan, R., Adu, K. W. (2014). Ultrahigh-Power Flexible Electrochemical Capacitors Using Binder-Free Single-Walled Carbon Nanotube Electrodes and Hydrogel Membranes. The Journal of Physical Chemistry C, 118(6), 2943–2952.

2013 – 2004

  • Lee, H., Rajagopalan, R. (2013). Preparation and characterization of ultrathin free-standing carbon films. Journal of the Korean Physical Society, 63(10), 1859–1863.
  • Qajar, A., Peer, M., Rajagopalan, R., Liu, Y., Brown, C., Foley, H. (2013). Surface compression of light adsorbates inside microporous PFA-derived carbons. Carbon, 60, 538–549.
  • Qajar, A., Peer, M., Rajagopalan, R., Foley, H. (2013). Characterization of Micro-and Mesoporous Materials Using Accelerated Dynamics Adsorption. Langmuir, 29(40), 12400–12409.
  • Peer, M., Qajar, A., Holbrook, B.-P. M., Rajagopalan, R., Foley, H. (2013). Platinum embedded within carbon nanospheres for shape selective liquid phase hydrogenation. Carbon, 57, 485–497.
  • McNamara, K. W., Ayyappan, P., Rajagopalan, R., Chen, J. G., Foley, H. (2013). Localized crystallization of polyfurfuryl alcohol derived carbon by alkali metals. Carbon, 56, 109–120.
  • Holbrook, B. P. M., Rajagopalan, R., Dronavajjala, K., Choudhary, Y. K., Foley, H. (2013). Molecular sieving carbon catalysts for liquid phase reactions: Study of alkene hydrogenation using platinum embedded nanoporous carbon. Journal of Molecular Catalysis A: Chemical, 367, 61–68.
  • Peer, M., Qajar, A., Rajagopalan, R., Foley, H. (2013). On the effects of emulsion polymerization of furfuryl alcohol on the formation of carbon spheres and other structures derived by pyrolysis of polyfurfuryl alcohol. Carbon, 51, 85–93.
  • Merritt, A. R., Rajagopalan, R., Trivedi, N. J. (2012). Selective adsorption of nitrate esters with nanostructured carbons. RSC Advances, 2(32), 12298–12304.
  • Qajar, A., Peer, M., Rajagopalan, R., Foley, H. (2012). High pressure hydrogen adsorption apparatus: Design and error analysis. International journal of hydrogen energy, 37(11), 9123–9136.
  • Tomko, T.*, Rajagopalan, R., Aksoy, P., Foley, H. (2011). Synthesis of boron/nitrogen substituted carbons for aqueous asymmetric capacitors. Electrochimica Acta, 56(15), 5369–5375.
  • Tomko, T.*, Rajagopalan, R., Lanagan, M. T., Foley, H. (2011). High energy density capacitor using coal tar pitch derived nanoporous carbon/MnO2 electrodes in aqueous electrolytes. Journal of Power Sources, 196(4), 2380–2386.
  • Manoharan, M. P., Kumar, S., Haque, M., Rajagopalan, R., Foley, H. (2010). Room temperature amorphous to nanocrystalline transformation in ultra-thin films under tensile stress: an in situ TEM study. Nanotechnology, 21(50), 505707.
  • Tewari, P., Rajagopalan, R., Furman, E., Lanagan, M. T. (2010). Effects of Interfacial Modifications on Electrical Properties of Laminar Composite Dielectrics. Langmuir, 26(24), 18817–18823.
  • Samuel, B., Rajagopalan, R., Foley, H., Haque, M. (2010). Effect of pyrolysis temperature on the microstructure of disordered carbon nanowires. Thin Solid Films, 519(1), 91–95.
  • Lee, H., Rajagopalan, R., Pantano, C. G. (2010). Chemical stability of glass with an ultra-thin disordered carbon coating. Journal of Non-Crystalline Solids, 356(4), 263–269.
  • Manoharan, M., Lee, H. K., Rajagopalan, R., Foley, H., Haque, M. (2010). Elastic Properties of 4–6 nm-thick Glassy Carbon Thin Films. Nanoscale research letters, 5(1), 14–19.
  • Tewari, P., Rajagopalan, R., Furman, E., Lanagan, M. T. (2009). Control of interfaces on electrical properties of SiO2–Parylene-C laminar composite dielectrics. Journal of colloid and interface science, 332(1), 65–73.
  • Yi, B., Rajagopalan, R., Burket, C. L., Foley, H., Liu, X., Eklund, P. C. (2009). High temperature rearrangement of disordered nanoporous carbon at the interface with single wall carbon nanotubes. Carbon, 47(10), 2303–2309.
  • Lee, H., Rajagopalan, R., Robinson, J. A., Pantano, C. G. (2009). Processing and characterization of ultrathin carbon coatings on glass. ACS applied materials & interfaces, 1(4), 927–933.
  • Mankidy, P. J., Rajagopalan, R., Pantano, C. G., Foley, H. (2009). Surface initiated growth of poly (ethyl 2-cyanoacrylate) nanofibers on surface-modified glass substrates. Chemistry of Materials, 21(5), 831–842.
  • Mankidy, P. J., Rajagopalan, R., Foley, H. (2008). Influence of initiators on the growth of poly (ethyl 2-cyanoacrylate) nanofibers. Polymer, 49(9), 2235–2242.
  • Burket, C. L., Rajagopalan, R., Foley, H. (2008). Overcoming the barrier to graphitization in a polymer-derived nanoporous carbon. Carbon, 46(3), 501–510.
  • Samuel, B., Rajagopalan, R., Foley, H., Haque, M. (2008). Temperature effects on electrical transport in semiconducting nanoporous carbon nanowires. Nanotechnology, 19(27), 275702.
  • Merritt, A., Rajagopalan, R., Foley, H. (2007). High performance nanoporous carbon membranes for air separation. Carbon, 45(6), 1267–1278. Mentored the graduate student and co-wrote the manuscript.
  • Samuel, B., Haque, M., Yi, B., Rajagopalan, R., Foley, H. (2007). Mechanical testing of pyrolysed poly-furfuryl alcohol nanofibres. Nanotechnology, 18(11), 115704.
  • Burket, C. L., Rajagopalan, R., Foley, H. (2007). Synthesis of nanoporous carbon with pre-graphitic domains. Carbon, 45(11), 2307–2310.
  • Dronavajjala, K. D., Rajagopalan, R. , Uppili, S., Sen, A., Allara, D. L., Foley, H. (2006). A simple technique to grow polymer brushes using in situ surface ligation of an organometallic initiator. Journal of the American Chemical Society, 128(40), 13040–13041.
  • Yi, B., Rajagopalan, R., Foley, H., Kim, U. J., Liu, X., Eklund, P. C. (2006). Catalytic polymerization and facile grafting of poly (furfuryl alcohol) to single-wall carbon nanotube: preparation of nanocomposite carbon. Journal of the American Chemical Society, 128(34), 11307–11313.
  • Mankidy, P. J., Rajagopalan, R., Foley, H. (2006). Facile catalytic growth of cyanoacrylate nanofibers. Chemical communications, (10), 1139–1141.
  • Burket, C. L., Rajagopalan, R., Marencic, A. P.*, Dronvajjala, K., Foley, H. (2006). Genesis of porosity in polyfurfuryl alcohol derived nanoporous carbon. Carbon, 44(14), 2957–2963.
  • Rajagopalan, R., Merritt, A., Tseytlin, A.*, Foley, H. (2006). Modification of macroporous stainless steel supports with silica nanoparticles for size selective carbon membranes with improved flux. Carbon, 44(10), 2051–2058.
  • Rajagopalan, R., Ponnaiyan, A., Mankidy, P. J., Brooks, A. W.*, Yi, B., Foley, H. (2004). Molecular sieving platinum nanoparticle catalysts kinetically frozen in nanoporous carbon. Chemical communications (21), 2498–2499.

2003 – 2000

  • Rajagopalan, R., Iroh, J. O. (2003). Characterization of polyaniline–polypyrrole composite coatings on low carbon steel: a XPS and infrared spectroscopy study. Applied surface science, 218(1), 58–69.
  • Iroh, J. O., Zhu, Y., Shah, K., Levine, K., Rajagopalan, R., Uyar, T., Donley, M., Mantz, R., Johnson, J., Voevodin, N. N., (2003). Electrochemical synthesis: a novel technique for processing multifunctional coatings. Progress in Organic coatings, 47(3), 365–375.
  • Rajagopalan, R., Iroh, J.O., (2002) Electrodeposition of adherent polyaniline-polypyrrole composite coatings on low carbon steel. Journal of Adhesion, 78, 835 – 860.
  • Rajagopalan, R., Iroh, J. O. (2002). A one-step electrochemical synthesis of polyaniline–polypyrrole composite coatings on carbon fibers. Electrochimica acta, 47(12), 1847–1855.
  • Rajagopalan, R., Iroh, J. (2002). Corrosion performance of polyaniline–polypyrrole composite coatings applied to low carbon steel. Surface engineering, 18(1), 59–63.
  • Iroh, J. O., Rajagopalan, R. (2002). Electrochemical copolymerization and characterization of aniline and isoprene in aqueous p-toluene sulfonic acid solution. Journal of applied polymer science, 84(1), 184–192.
  • Akundy, G. S., Rajagopalan, R., Iroh, J. O. (2002). Electrochemical deposition of polyaniline– polypyrrole composite coatings on aluminum. Journal of applied polymer science, 83(9), 1970–1977.
  • Rajagopalan, R., Iroh, J. (2002). Pretreatment and coating of low carbon steel using constant potential electrochemical process. Surface engineering, 18(1), 53–58.
  • Rajagopalan, R., Iroh, J. O. (2001). Development of polyaniline–polypyrrole composite coatings on steel by aqueous electrochemical process. Electrochimica Acta, 46(16), 2443–2455.
  • Iroh, J., Rajagopalan, R. (2000). Characterisation of conducting composite coatings formed on steel by aqueous electrochemical process. Surface engineering, 16(4), 321–326.
  • Iroh, J. O., Rajagopalan, R. (2000). Electrochemical polymerization of aniline on carbon fibers in aqueous toluene sulfonate solution. Journal of applied polymer science, 76(10), 1503–1509.
  • Iroh, J.O., Rajagopalan, R. (2000). Electrochemical synthesis of polyaniline-polypyrrole composite coatings on carbon fibres in aqueous toluene sulfonate solution. Surface engineering, 16(6), 481-486.
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