Detailed Impedance or Dielectric Measurement Papers

  1. L. Pruyn and R.A. Gerhardt, “Percolation in Borosilicate glass matrix composites containing Antimony-doped Tin Oxide segregated networks. Part I: Fabrication of Segregated Networks,” J.Am.Ceram.Soc., accepted (2013).

(DOI: 10.1111/jace.12534)

 

  1. L. Muhlbauer, S.M. Joshi and R.A. Gerhardt, “The Effect of Substrate Pore Size on the Network Interconnectivity and Electrical Properties of Dropcasted Multiwalled Carbon Nanotube Thin Films,” J. Mat.Res 28[12],1617-1624 (2013). Published online 7 Jun. 2013.

(DOI: 10.1557/jmr.2013.143)

 

  1. Salil M. Joshi and Rosario A. Gerhardt, “Effect of annealing atmosphere (Ar vs. air) and temperature on the electrical and optical properties of spin-coated colloidal indium tin oxide films,”  Mat. Sc., 48 [3], 1465 (2013).

(doi: 10.1007/s10853-012-6900-6)

 

  1. L. Pruyn and R. A. Gerhardt, “Fabrication of Conductive Glass Nanocomposites with Networks of Antimony Tin Oxide,” Materials Research Society Symposium Proceedings, Spring 2013

(DOI: 10.1557/opl.2013.712)

 

  1. L. Muhlbauerand R. A. Gerhardt, “Determining In-plane and Thru-plane Percolation Thresholds for Carbon Nanotube Thin Films Deposited on Paper Substrates Using Impedance Spectroscopy,” Materials Research Society Symposium Proceedings, Spring 2013

(DOI: 10.1557/opl.2013.1032)

 

  1. R. Brandt and R.A. Gerhardt ,“Assessment of Homogeneity of Extruded Alumina-SiC Composite Rods Used in Microwave Heating Applications by Impedance Spectroscopy,” Materials Research Society Symposium Proceedings, Spring 2013 (.DOI: 10.1557/opl.2013.657)

(DOI: 10.1557/opl.2013.657)

 

  1. D. Bertram, R.A.  Gerhardt and J.W. Schultz, “Impedance response and modeling of composites containing aligned semiconductor whiskers: Effects of dc-bias partitioning and percolated-cluster length, topology, and filler interfaces,” Journal of Applied Physics111 (12), 4913-4927(2012). Published online 27 Jun. 2012.

(DOI: 10.1063/1.4729119)

 

  1. Surajit Kumar and Rosario A. Gerhardt, “Role of Geometric Parameters in Electrical Measurements of Insulating Thin Films Deposited on a Conductive Substrate,” Measurement Science and Technology23,035602 (17pp) (2012).

(DOI: 10.1088/0957-0233/23/3/035602)

 

  1. Salil Joshi, Gregory W. Book and Rosario A. Gerhardt, “A Comparative Study of the Effect of Annealing and Plasma Treatments on the Microstructure and Properties of Colloidal  Indium Tin Oxide Films and Cold-Sputtered Indium Tin Oxide Films”, Thin Solid Films 520, 2723-2730(2012). Published online 26 Nov. 2011.

(DOI: 10.1016/j.tsf.2011.11.052)

 

  1. D. Bertram, R.A. Gerhardt and J.W. Schultz, “Extruded and Pressureless-Sintered Al2O3-SiCw Composite Rods: Fabrication, Structure, Electrical Behavior, and Elastic Modulus,” J.Am.Ceram.Soc. 94[12],4391-4398(2011). Published online 27 Jul 2011.

(DOI: 10.1111/j.1551-2916.2011.04745.x)

 

  1. D. Bertram and R.A. Gerhardt, “Effects of Frequency, Percolation, and Axisymmetric Microstructure on the Electrical Response of Hot-Pressed Alumina–Silicon Carbide Whisker Composites,” J. Am. Ceram. Soc. 94[4]1125-1132(2011). Published online 18 Oct 2010.

(DOI: 10.1111/j.1551-2916.2010.04156.x)

 

  1. Timothy Pruyn and Rosario A. Gerhardt , “Characterization of Ceramic Powders During Compaction Using Electrical Measurements,” Advances in Bioceramics and Porous Ceramics IV: Ceramic Engineering and Science Proceedings, Volume 32, Issue 6, 199-210(2011). Published online 16 Nov. 2011.

(DOI: 10.1002/9781118095263.ch18)

 

  1. Matthew P. Garrett,Ilia N. Ivanov, Rosario A. Gerhardt, Alex A. Puretzky, And David B. Geohegan, “Separation of Junction and Bundle Resistance in Single Wall Carbon Nanotube Percolation Networks by Impedance Spectroscopy,” Phys.Lett. 97,163105  (2010). Republished in Virtual Journal of Nanotechnology. Published online 18 Oct. 2010.

(DOI: 10.1063/1.3490650)

 

  1. Waddell, R. Ou, C.J. Capozzi, S. Gupta, C.A. Parker, R.A. Gerhardt, K. Seal, S.V. Kalinin and A.P. Baddorf, “Detection of percolating paths in polyhedral segregated network composites using electrostatic force microscopy and conductive atomic force microscopy,” Appl.Phys.Lett. 95,233122 (2009). Published online 11 Dec. 2009.

(DOI: 10.1063/1.3265742)

 

  1. Brian D. Bertram And Rosario A. Gerhardt, “Room Temperature Properties of Electrical Contacts to Alumina Composites Containing Silicon Carbide Whiskers,”  Applied Phys. 105,074902 (2009). Published online 3 April 2009.

(DOI: 10.1063/1.3086279)

 

  1. Surajit Kumar and Rosario A. Gerhardt, “Numerical Study of the Electrical Properties of Insulating Thin Films Deposited on a Conductive Substrate,” COMSOL Users Workshop Proceedings,Boston, October 2009.

(Link)

 

  1. Charles J. Capozzi, Zhi Li, Rosario A. Gerhardt and Robert J. Samuels, “Impedance Spectroscopy And Optical Characterization Of Polymethylmethacrylate/Indium Tin Oxide Nanocomposites With Three-Dimensional Voronoi Microstructures,  Applied Physics 104[11],114902/1-114902/10(2008).

(DOI: 10.1063/1.3032512)

 

  1. Balaji Rao and Rosario A. Gerhardt, “Effect of Alkaline Earth Modifier Ion on the Optical, Magnetic and Electrical Properties of Lithium Nickel Borate Glasses,” Materials Chemistry and Physics112[1], 186-197 (2008). Published online 7 July 2008.

(DOI: 10.1016/j.matchemphys.2008.05.046)

 

  1. Charles J. Capozzi and Rosario A. Gerhardt, “Correlation of the ac Electrical Conductivity and the Microstructure of PMMA/ITO Nanocomposites that Possess Phase-Segregated Microstructures,”  Phys. Chem. C 112 [49],19372-19382 (2008). Published online 12 Nov. 2008.

(DOI: 10.1021/jp808595q)

 

  1. Balaji Rao, Rosario A. Gerhardt and N. Veeraiah, “Spectroscopic Characterization, Conductivity and Relaxation Anomalies in the Li2O-MgO–B2O3Glass System: Effect of Nickel Ions,” J. Phys.Chem. Solids 69, 2813–2826(2008). Published online 9 July 2008.

(DOI: 10.1016/j.jpcs.2008.06.145)

 

  1. M. Raj, D. Balaraman, V. Govind,  I.R. Abothu, W. Lixi, R. Gerhardt, M. Swaminathan and R. Tummala,  “Processing and Dielectric Properties of Nanocomposite Thin Film “Supercapacitors” for High-Frequency Embedded Decoupling,”  IEEE Transactions on [see also Components, Packaging and Manufacturing Technology, Part A: Packaging Technologies]30[4], 569-578(2007). Published online 27 Nov. 2007.

(DOI: 10.1109/TCAPT.2007.901736)

 

  1. S.K.G. Kelekanjeri and R.A. Gerhardt, “Electrical characterization of aged Waspaloy microstructures,”Advanced Materials Research, 15-17,876-881 (2007). Published online Feb. 2006.

(DOI: 10.4028/www.scientific.net/AMR.15-17.876)

 

  1. Cantwell G. Carson, R.A. Gerhardt and R. Tannenbaum, “Chemical Stability and Characterization of Rhodium-Diisocyanide Coordination Polymers,  Phys. Chem. B 111,14114-14120(2007). Published online 30 Nov. 2007.

(DOI: 10.1021/jp0765852)

 

  1. J. Capozzi and R.A. Gerhardt, “Novel Percolation Mechanism in PMMA matrix composites containing segregated ITO nanowire networks,” Adv .Functional Matls 17,2515-2521(2007). Published online 7 Aug. 2007.

(DOI: 10.1002/adfm.200600756)

 

  1. G. Carson, R.A. Gerhardt and R. Tannenbaum, “Dielectric Properties of [Rh(1,4-diisocyanobenzene) (cl)]nwith respect to Moisture,” Polymer Preprints 96, 238 (2007).
  2. Ou, S. Gupta, C.A. Parker and R.A. Gerhardt, “Fabrication and Electrical Conductivity of Poly(methyl methacrylate) (PMMA)/Carbon Black (CB) Composites: Comparison between an ordered carbon black nanowire-like segregated structure and a randomly dispersed carbon black nanostructure” J. Phys. Chem. B 110 [45], 22362-22370(2006). Published online 17 Oct. 2006.

(DOI: 10.1021/jp064498o)

 

  1. Gupta, R.Ou and R.A. Gerhardt, “Effect of Fabrication Method on the Electrical Properties of Poly(acrylonitrile-co-butadiene-co-styrene)/Carbon Black Composites,” J.Electronic Matls. 35[2], 224-229(2006).

(DOI: 10.1007/BF02692439)

 

  1. S. Mebane and R.A. Gerhardt, “Interpreting Impedance Response of Silicon Carbide Whisker/Alumina Composites Through Microstructural Simulation,” J.Am.Ceram.Soc. 89[2], 538-543(2004). Published online 27 Sept. 2005.

(DOI: 0.1111/j.1551-2916.2005.00710.x)

 

  1. Ou, G. Cui, R.A. Gerhardt, and R.J. Samuels, “Effect of stretching on the structure and electrical conductivity of doped and undoped  poly(phenylene vinylene) thin films,” Electrochimica Acta 51[8-9], 1728-1735(2006). Published online 31 Aug. 2005.

(DOI: 10.1016/j.electacta.2005.02.140)

 

  1. Ou, R.A. Gerhardt, D. Semler-Rosenthal and R.A. McCauley, “Electrical Properties  of Al2O3-CeO2 Composites,” Chapter in Ceramic Materials and Multilayer Electronic Devices: Ceramic Transactions, Volume 150,American Ceramic Society, pp. 273-280(2004).

(ISBN: 978-1-57498-205-3)

 

  1. S. Mebane, A.M. Gokhale and R.A. Gerhardt, “The Effect of Microstructural Interconnectivity on the Resistivity of Anisotropic Al2O3-SiCw Composites,” AIP. Conf. Proc. 712, 350-354(2004).

(DOI: 10.1063/1.1766549)

 

  1. J. Capozzi, S. Shackelford, R. Ou and R.A. Gerhardt, “Study of Percolation in PMMA/Indium Tin Oxide Composites, Mat.Res.Symp.Proc. 819,303-308(2004).

(DOI: 10.1557/PROC-819-N3.13)

 

  1. Cui and R.A. Gerhardt, “Characterization of the electrical properties of Nickel-based CMSX-4 super-alloys using atomic force microscopy (AFM),” Microscopy & Microanalysis Conference 2004.

(DOI: 10.1017/S1431927604882291)

 

  1. P.  Raj, D. Balaraman, V. Govind, L. Wan, R. Abothu, R. Gerhardt, S. Bhattacharja, M. Swaminathan and R. Tummala, “High Frequency Characteristics of Nanocomposite Thin Film “Supercapacitors” and their Suitability for Embedded Decoupling,” IEEE Proc. Of ECTC Conference,154-161(2004) . (Outstanding Paper Award)

(DOI: 10.1109/EPTC.2004.1396595)

 

  1. Ou, R.A. Gerhardt, C. Marrett, A. Moulart and J.S. Colton, “Assessment of Percolation and Homogeneity in ABS/Carbon Black Composites by Electrical Measurements,” Composites Part B: Engineering 34B[7], 607-614(2003).Published online 19 July 2003.

(DOI: 10.1016/S1359-8368(03)00085-4)

 

  1. Ou, R. Samuels and R.A. Gerhardt, “Structure-electrical property study of anisotropic polyaniline films,” J. Poly. Sc.: Pol. Phys. 41[8]:823-841(2003). Published online 5 Mar 2003.

(DOI: 10.1002/polb.10430)

 

  1. Ou, R.A. Gerhardt and R. Samuels, “Three Dimensional Structure-Electrical Properties of Oriented PPV and PANI Films,” Advances in Electronic Packaging, EPTC Interpack  2003, 87-92.
  2. Ou, H. Qin, R.A. Gerhardt and R. Ruh, “Electrical Properties of SiC-AlN Composites,” Ceram. Eng. Sc. Proc. 24[4],349-354(2003). Published online 26 Mar 2008.

(DOI: 10.1002/9780470294826.ch51)

 

  1. A. Gerhardt, R. Ou, J. Colton, C. Marrett and A. Moulart, “Assessment of percolation and homogeneity in ABS/carbon black composites,” Ninth International Conference on Composites Engineering, Proc. ICCE/9,231 (2002).
  2. Ou, R. Samuels and R.A. Gerhardt, “The Structure and Electrical Properties of Polyaniline,” Mat.Res.Symp.Proc. 699,333-338(2002).

(DOI: 10.1557/PROC-699-R7.2)

 

  1. Zou, T. Makram and R.A. Gerhardt, “Detection of Compositional Fluctuations in High Temperature Exposed Waspaloy,” Mat.Res.Symp.Proc. 699, 301-306(2002).

(DOI: 10.1557/PROC-699-R2.6)

 

  1. Pinkos, C. Laboy and R.A. Gerhardt, “Effect of Grain Boundaries and Indentation Load on the Electrical Properties of Nickel Base Super-alloys,” Mat.Res.Symp.Proc. 699, 289-294(2002).

(DOI: 10.1557/PROC-699-R2.5)

 

  1. Runqing Ou, Robert Samuels and R. A. Gerhardt, “In-plane impedance spectroscopy of doped polyaniline films,”  Plastic Film and Sheeting 17[4],184-196(2001).

(DOI: 10.1106/TL89-774C-VN9P-BKL1)

 

  1. A. Gerhardt and R. Ruh, “Volume fraction and whisker orientation dependence of the electrical properties of SiC-whisker-reinforced mullite composites,” J. Am. Ceram. Soc.  84[10],2328-2334(2001). Published online 20 Dec. 2004.

(DOI: 10.1111/j.1151-2916.2001.tb01010.x)

 

  1. A. Gerhardt, J. Runyan, C. Sana, D.S. McLachlan and R. Ruh, “Electrical Properties of Boron Nitride Matrix Composites: III, Observations Near the Percolation Threshold in BN-B4C Composites”, J. Am. Ceram. Soc. 84[10],2335-2342(2001). Published online 20 Dec. 2004.

(DOI: 10.1111/j.1151-2916.2001.tb01011.x)

 

  1. Runyan, R.A. Gerhardt and R. Ruh, “Electrical properties of Boron Nitride matrix composites: II, Dielectric Relaxations in Boron Nitride–Silicon Carbide Composites,” J. Am. Ceram. Soc.  84[7],1497-1503(2001). Published online 20 Dec. 2004.

 (DOI: 10.1111/j.1151-2916.2001.tb00867.x)

 

  1. Runyan, R.A. Gerhardt and R. Ruh, “Electrical properties of Boron Nitride matrix composites: I, Analysis of the McLachlan equation in modeling the conductivity of Boron Nitride–Boron Carbide and Boron Nitride–Silicon Carbide composites”, J. Am. Ceram. Soc. 84[7], 1490-1496(2001). Published online 20 Dec. 2004.

(DOI: 10.1111/j.1151-2916.2001.tb00866.x)

 

  1. Dong and R.A. Gerhardt, “Electrical Characterization of Sol-Gel Derived Pb(Zr,Ti)O3 Ceramics,” Chapter in Dielectric Ceramic Materials: Ceramic Transactions, Volume 100, American Ceramic Society,pp. 367-375 (1999).

(ISBN: 978-1-57498-066-0)

 

  1. R. Kokan, R.A. Gerhardt  and R. Ruh, “Electrical Properties of BN-B4C and BN-SiC Composites,” IEEE Proc. CEIDP, 252-255 (1998).

(DOI: 10.1109/CEIDP.1998.733955)

 

  1. Dong and R.A. Gerhardt, “Frequency and Temperature Dependence of the Dielectric Properties of Ferroelectric Materials,” IEEE Proc. CEIDP, 327-330 (1998).

(DOI: 10.1109/CEIDP.1998.733998)

 

  1. R. Kokan, R.A. Gerhardt , R. Ruh and D.S. McLachlan, “Dielectric Spectroscopy of Insulator-Conductor Mixtures,” Mat.Res.Symp.Proc. Vol. 500, 341-346 (1998).

(DOI: 10.1557/PROC-500-341)

 

  1. R. Kokan, R.A. Gerhardt and C-H Su, “Dielectric Spectroscopy of ZnSe Grown by Physical Vapor Transport,” Mat.Res.Symp.Proc. Vol. 487, 517-522 (1998).

(DOI: 10.1557/PROC-487-517)

 

  1. Dong and R.A. Gerhardt, “Complex Dielectric Spectroscopy of a Li0.982Ta1.004O3 Ferroelectric Single Crystal,”  Mat.Res.Symp.Proc. Vol. 500, 195-200 (1998).

(DOI: 10.1557/PROC-500-195)

 

  1. A. Gerhardt and D.S. McLachlan, “Frequency Behavior of Percolating Systems,” Progress in Electromagnetics Research Extended Abstracts, July 1998.
  2. Erbil, Y. Kim and R.A. Gerhardt , “Giant Permittivity in Epitaxial Ferroelectric Heterostructures,”   Rev. Lett. 77, 1628-1631(1996).

(DOI: 10.1103/PhysRevLett.77.1628)

 

  1. Kushwaha, R.A. Gerhardt, Y. Kim  and A. Erbil, “Electrical Characterization of MOCVD Grown Epitaxial and Polycrystalline PLT Thin Films,” IEEE Proc. Tenth International Symposium on Applications of Ferroelectric ISAF ‘96,  337-340 (1996).

(DOI: 10.1109/ISAF.1996.602762)

 

  1. A. Gerhardt and W. Cao, “Distinguishing bulk water from adsorbed water via dielectric measurements,” IEEE Proc. CEIDP, 102-105(1996).

(DOI: 10.1109/CEIDP.1996.564605)

 

  1. Kim, A. Erbil, A. Kushwaha and R.A. Gerhardt,  “Study of Ferroelectric Thin Film Superlattices,” Mat.Res.Symp.Proc.vol. 433, 339-344 (1996).

(DOI: 10.1557/PROC-433-339)

 

  1. S.  Meyers, G. Zhang and R.A. Gerhardt , “Dielectric Properties Dependence on Residual Sodium and Potassium Content in Silica Xerogels,” Mat.Res.Soc.Symp.Proc.Vol.411, 217-222 (1996).

(DOI: 10.1557/PROC-411-217)

 

  1. Y. Lin, R.A. Gerhardt and R.F. Speyer, “Complex Impedance Analysis of Silica Surface Film on Molybdenum  Disilicide,” Mat. Res. Soc. Symp.Proc. vol. 411, 223-228 (1996).

(DOI: 10.1557/PROC-411-223)

 

  1. C. Kaplan and R.A. Gerhardt, “Effect of Trace Impurities on UV Irradiation Induced Changes in Aluminum Nitride Substrates,” ISHM Proc. 27th Int. Symp. on Microelectronics, 415-420 (1994).

(ISBN: 0930815416)

 

  1. Gerhardt and T.R. Grossman, “Characterization of Porosity in Thermal Barrier Coatings,” Chapter in Ceramic Thin and Thick Films: Ceramic Transactions, Volume 11, American Ceramic Society, pp. 189-200 (1990).

ISBN: 0944904270)

 

  1. Cao, R. Gerhardt and J.B. Wachtman, Jr., “Dielectric Relaxation of Water Adsorbed on Monolithic Porous Silica Gels,” Chapter in Ceramic Dielectrics: Composition, Processing and Properties: Ceramic Transactions, Volume 8, American Ceramic Society, pp. 175-184 (1990).

(ISBN: 9780944904220)

 

  1. Cao, R. Gerhardt and J.B. Wachtman, Jr., “Effect of Sodium Ions on the Dielectric Conductivity of Porous Silica in Humid Environments,” Mat. Res. Soc. Symp. Proc. vol. 195: 471-476 (1990).

(DOI: 10.1557/PROC-195-471)

 

  1. Gerhardt and R. Ruh, “Electrical Properties of SiC-reinforced Mullite Composites,” Extended Abstracts of the Electronics Division at the 92nd Annual Meeting of the American Ceramic Society, May 1990.
  2. Anderson, R. Gerhardt, J.B. Wachtman, Jr., S. Becher and D.G. Onn,  “Thermal, Mechanical and Dielectric Properties of Mullite Cordierite Composites,” Chapter in Ceramic Subtrastes and Packages for Electronic Applications: Advances in Ceramics, Vol. 26, American Ceramic Society, pp. 265-278 (1989).

(ISBN: 0-916094-35-9)

 

  1. V. Ramanujachary, B.T. Collins, M. Greenblatt, R. Gerhardt and E.A.  Reitman, “Dielectric Investigation of the Sliding Charge-Density Wave in T10.3MoO3,” Phys. Rev. B. 38 [11], 7243-7249 (1988).

(DOI: 10.1103/PhysRevB.38.7243)

 

  1. Cao, R. Gerhardt and J.B. Wachtman, Jr., “Effects of Alkali Ions and Water Adsorption on the Dielectric Properties of Bulk Porous Silica By a Colloidal Processing Method,” Extended Abstracts of the Electronics Division at the 90sh Annual Meeting of the American Ceramic Society, May 1988.
  2. Gerhardt, “Influence of Geometric Factors on Dielectric Constant Measurements,” Extended Abstracts of the Electronics Division at the 90sh Annual Meeting of the American Ceramic Society, May 1988.
  3. K. Lee, R. Gerhardt and A.S. Nowick,  “Anelastic and Dielectric Relaxation of Scandia-Doped Ceria,” J. de Physique 48 [12],C8/251-C8/256 (1987).

(DOI: 10.1051/jphyscol:1987835)

 

  1. Gerhardt, W.K. Lee and A.S. Nowick,  “Anelastic and Dielectric Relaxation of Scandia-Doped Ceria,” J. Phys. Chem. Solids 48 [6], 563-570 (1987). Published online 30 Aug. 2002.

(DOI: 10.1016/0022-3697(87)90053-9)

 

  1. Gerhardt and A.S. Nowick, “Grain-Boundary Effect in Ceria Doped with Trivalent Cations, I: Electrical Measurements,” J. Amer. Ceram. Soc. 69 [9], 641-646 (1986). Published online 8 Mar. 2005.

 (DOI: 10.1111/j.1151-2916.1986.tb07464.x)