Dr. Fereydoon Namavar Orthopedic Surgery and Rehabilitation Specialists Web Page email: Dr. Namavar NCMN Homepage

Department of Orthopedic Surgery and Rehabilitation
985360 Nebraska Medical Center
Omaha, NE 68198-1080
Office: 402 559-8558
Fax: 402 559-2575
fnamavar@unmc.edu
Namavar's webpage

Current Research

   As a Professor in the Department of Orthopaedic Surgery and Rehabilitation, Dr. Namavar’s work focuses on the development of novel concepts and technologies to maximize the lifetime of orthopaedic implants and minimize the possibility of wear and revision surgery. These innovations include the development of novel nanostructure materials and diagnostic techniques for both in vitro and in vivo applications.
    Dr. Namavar’s research is conducted at the Nanotechnology Laboratory, which is housed at the Scott Technology Center on the Aksarben campus. His team uses an ion beam assisted deposition (IBAD) system, which combines physical vapor deposition with concurrent ion beam bombardment in a high vacuum environment to create several specialized coatings that are being developed for orthopaedic implants, biomedical use, and novel materials for saving energy by reducing weight or to advance nuclear energy. Presently, the highlights of Dr. Namavar’s research include:

  • Application of nanotechnology in total joint arthroplasty:

    (i) Controlling and enhancing the bone growth
    (ii) Developing antibacterial surfaces for short and long term applications
    (iii) Reducing the failure of orthopaedic implants and revision surgery

  • Interaction of (adult) stem cells and organisms with micro and nanostructured engineered materials
  • Effect of electrical stimulation on growth and differentiation of (adult) stem cells on nano-engineered surfaces
  • Understanding how cell–Protein interacts with nano-structures
  • Developing  smart coatings for orthopaedics and dental implants
  • Developing Biological  Glue

    Many of these works involve basic and fundamental research, such as studying the nature of nanostructured materials and determining the physical and chemical properties of their grain size, phases, porosity and composition.
     Dr. Namavar has authored or co-authored well over 150 scientific papers in reviewed journals and has been granted several U.S. patents. He has been awarded over 50 grants and contracts from NSF, DOE, NIH, NASA and DOD.

Patents

“Nano-crystalline, Homo-metallic, and Protective Coatings”, F. Namavar, U.S. Patent No. 7,048,767 issued May 23, 2006.
 Additional and new claims “Nano-crystalline, Homo-metallic, Protective Coatings," F. Namavar, United States Patent Application number: 20060282172, December 14, 2006.

“SiC/III-V Nitride Heterostructures on SiC/SiO2/Si for Optoelectronic Devices,” R. Soref and F. Namavar, U.S. Patent No. 5,880,491, issued March 9, 1999.

“Wavelength Selective Photodetector,” N.M. Kalkhoran and F. Namavar, U.S. Patent No. 5,726,440 issued Mar. 10, 1998.
“Optoelectronic Switching and Display Device with Porous Silicon,” F. Namavar, N.M. Kalkhoran, and H.P. Maruska, U.S. Patent No. 5,272,355 issued Dec. 21, 1993.
“High Performance GaAs Devices and Method,” F. Namavar and N.M. Kalkhoran, U.S. Patent No. 5,436,499 issued July 25, 1995.

“Multi-band Spectroscopic Photodetector Array,” N.M. Kalkhoran and F. Namavar, U.S. Patent No. 5,671,914 issued Sep. 30, 1997.

Namavar, F. (2003). Nanocrystalline, homometallic, protective coatings for orthopedic prosthesis. U.S. Pat. Appl. Publ. 16 pp. CODEN: USXXCO US 2003229399 A1 20031211 CAN 140:19917 AN 2003:971784.

Soref, R. A., Namavar, F. (1999). Multilayer films with SiC and nitride heterostructures on SiC/SiO2/Si substrates for optical and electronic devices. U.S. 14 pp. CODEN: USXXAM US 5880491 A 19990309 CAN 130:203784 AN 1999:175732 CAPLUS.

Kalkhoran, N. M., Namavar, F. (1998). Wavelength Selective Photodetector, U.S. Patent No. 5,726,440 issued Mar. 10, 1998.

Kalkhoran, N. M., Namavar, F. (1997). Multiband spectroscopic photodetector array. U.S. 23 pp. CODEN: USXXAM US 5671914 A 19970930 CAN 127:270293 AN 1997:640187.

Recent Publications

Edmondson, P.; Zhang, Y.; Moll, S.; Namavar, F.; and Weber, W.: Irradiation effects on microstructure change in nanocrystalline ceria – Phase, lattice stress, grain size and boundaries. Acta Materialia, 60: 5408-5416, September 2012.

Fengyuan Lu, Mengbing Huang, Faisal Yaqoob, Maik Lang, Fereydoon Namavar, Christina Trautmann, Hongtao Sun, Rodney C. Ewing, and Jie Lian: Displacive radiation-induced structural contraction in nanocrystalline ZrN. Appl. Phys. Lett. Vol 101:4, 041904; http://dx.doi.org/10.1063/1.4738772, July 24, 2012.

Lu, F.; Wang, J.; Lang, M.; Toulemonde, M.; Namavar, F.; Trautmann, C.; Zhang, J.; Ewing, R. C.; and Lian, J.: Amorphization of nanocrystalline monoclinic ZrO 2 by swift heavy ion irradiation. Physical Chemistry Chemical Physics, 14(35): 12295-12300, July 2012.

Edmondson, P.; Zhang, Y.; Moll, S.; Varga, T.; Namavar, F.; and Weber, W.: Anomalous grain growth in the surface region of a nanocrystalline CeO2 film under low-temperature heavy ion irradiation. Physical Review B, (85): 214113 DOI: 10.1103/PhysRevB.85.214113, June 15, 2012.

Lawrence, N.; Wells-Kingsbury, J.; Ihrig, M.; Fangman, T.; Namavar, F.; and Cheung, C.: Controlling E. coli Adhesion on High-k Dielectric Bioceramics Films using Poly(amino acid) Multilayers. Langmuir, 28(9): 4301-4308, Doi:10.1021/la2033725, (Print): March 6, 2012; (Web): February 17, 2012.

Namavar, F; Rubenstein, A; Sabirianov, RF; Thiele, GM; Sharp, G; Pokharel, U; Namavar, RM; Garvin, K. Engineered Nanostructured Coatings for Enhanced Protein Adsorption and Cell Growth, MRS Proceedings / Volume 1418 / DOI:10.1557/opl.2012.394. Published online: 27 February 2012.

Lu, F.; Lang, M.; Huang, M.; Namavar, F.; Trautmann, C.; Ewing, R. C.; and Lian, J.: ZrSi formation at ZrN/Si interface induced by ballistic and ionizing radiations. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, doi: 10.1016/j.nimb.2012.01.023, Available online: 24 January 2012.

P.D. Edmondsona, W.J. Weberb, F. Namavar, Y. Zhang: Determination of the displacement energies of O, Si and Zr under electron beam irradiation. Journal of Nuclear Materials, Volume 422, Issues 1–3, Pages 86–91, March 2012. Published online January, 12, 2012. 

Wang, G.; Luo, G.; Soo, Y. L.; Sabirianov, R. F.; Lin, H. J.; Mei, W. N.; Namavar, F.; and Cheung, C. L.: Phase stabilization in nitrogen-implanted nanocrystalline cubic zirconia. Physical Chemistry Chemical Physics, 13(43): 19517-19525, November 2011.

Edmondson, P. D.; Weber, W. J.; Namavar, F.; and Zhang, Y.: Lattice distortions and oxygen vacancies produced in Au+- irradiated nanocrystalline cubic zirconia. Scripta Materialia, 65(8): 675-678, DOI: 10.1016/j.scriptamat.2011.07.010, October 2011.

Zhang, J.; Lian, J.; Namavar, F.; Wang, J.; Haider, H.; Garvin, K.; and Ewing, R. C.: Nanosized rutile (TiO2) thin film upon ion irradiation and thermal annealing. Journal of Physical Chemistry C, 115(46): 22755-22760, DOI: 10.1021/jp2056283, October 2011.

Zhang, Y.; Edmondson, P. D.; Varga, T.; Moll, S.; Namavar, F.; Lan, C.; and Weber, W. J.: Structural modification of nanocrystalline ceria by ion beams. Physical Chemistry Chemical Physics, 13(25): 11946-11950, DOI: 10.1039/c1cp21335k, July 2011.

Lu, F.; Zhang, J.; Huang, M.; Namavar, F.; Ewing, R. C.; and Lian, J.: Phase transformation of nanosized ZrO2 upon thermal annealing and intense radiation. Journal of Physical Chemistry C, 115(15): 7193-7201, DOI: 10.1021/jp109558s, April 2011.

Sabirianov, R. F.; Rubinstein, A.; and Namavar, F.: Enhanced initial protein adsorption on engineered nanostructured cubic zirconia. Physical Chemistry Chemical Physics, 13(14): 6597-6609, doi: 10.1039/c0cp02389b, April 2011.

Weber, W.; Zhang, Y.; Jiang, W.; Edmondson, P.; and Namavar, F.: Abstract: T14.00007: Irradiation Response of Nanocrystalline Cubic Zirconia in Session T14: Energy Resources Followed by Energy Production, Sustainability and Environment. Bulletin of the American Physical Society (APS) March Meeting 2011, 56(1), March 21-25, 2011.

Sabirianov, R.; Wang, G.; Soo, Y.; Luo, G.; Lin, H.; Mei, W.; Namavar, F.; and Cheung, C.: Abstract: L10.00004 : Role of Nitrogen Dopants in the Stabilization of Nancrystalline Cubic Zirconia in Session L10: Nanoclusters and Nanowires on Surfaces. Bulletin of the American Physical Society (APS) March Meeting 2011, 56(1), Dallas, TX, March 21-25, 2011.

Edmondson, P. D.; Wang, C.; Zhu, Z.; Namavar, F.; Weber, W. J.; and Zhang, Y.: Radiation induced cavity formation and gold precipitation at the interfaces of a ZrO2/SiO2/Si heterostructure. 2010 Materials Research Society Symposium Proceedings, pp. 111-116, Boston, MA, March 2011.

Edmondson, P. D.; Zhang, Y.; Namavar, F.; Wang, C. M.; Zhu, Z.; and Weber, W. J.: Defect- and strain-enhanced cavity formation and Au precipitation at nano-crystalline ZrO2/SiO2/Si interfaces. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 269(2): 126-132, DOI: 10.1016/j.nimb.2010.10.014, January 2011.

“Ion Beam-Induced Amorphous-to-Tetragonal Phase Transformation and Grain Growth of Nanocrystalline Zirconia”. Lian, J.; Zhang, J.; Namavar, F.; Zhang, Y.; Lu, F.; Haider, H.; Garvin, K.; Weber, W.J., Ewing, C. Nanotechnology. Vol. 20, 2009.
http://www.iop.org/EJ/abstract/0957-4484/20/24/245303

“Lotus Effect in Engineered Zirconia”. Namavar, F.; Cheung, C.L.; Sabirianov, R.F.; Mei, W.N.; Zeng, X.C.; Wang, G.; Haider, H. and Garvin, K.L. Nano Letters  ASAP Article, 10.1021/nl072147v, Web Release Date: March 14, 2008.
 http://pubs.acs.org/cgi-bin/abstract.cgi/nalefd/asap/abs/nl072147v.html

“Triple Smart Surfaces for Implant Devices”. Namavar, F.; Jackson, J.D.; Sharp, J.G.; Gustafson, T.J; Kibuule; L.K, Mann; E.; Bales, T.J., Haider, H. and Garvin, K.L.  Proceeding of The 11th Meeting-Seminar of Ceramics, Cells and Tissues topic, “Nanotechnology for Functional Repair and Regenerative Medicine the Role of Ceramics as In Bulk and as Coating”, edited by Ravaglioli, A. and Krajewski, A., Consiglio Nazionale Delle Richerche: Faenza, Italy April 2008, p. 26-37.

“Structural Study of Titanium Oxide Films Synthesized by Ion Beam-Assisted Deposition.” Wang, G.; Brewer, J.R.; Namavar, F.; Sabirianov, R.F.; Haider, H.; Garvin, K.L. and Cheung, C.L. Scanning. 30: 59–64, (2008).
http://www3.interscience.wiley.com/journal/114216512/issue

“Origin of Phase Stability in Nanostructurally Stabilized Pure Cubic Zirconia Investigated by EXAFS”. Soo,Y.L.; Chen, P.J.; Huang, S.H.; Shiu, T.J.; Tsai, T.Y.; Chow, Y.H.; Lin, Y.C.;  Weng, S.C.; Chang, S.L.; Cheung, C.L.; Sabirianov, R.F.; Mei, W.N.; Namavar, F.; Haider, H.; Garvin, K.L.; Lee, J.F.; Lee, H.Y.; Chu, P.P.  J. Appl. Phys. 104, 113535 (2008).

“Searching for Smart Durable Coatings to Promote Bone Marrow Stromal Cell Growth While Preventing Biofilm Formation”  Namavar, F.; Jackson, J.D.; Sharp, J.G.; Mann, E.E.; Bayles, K.; Cheung, C.L.; Feschuk, C.; Varma, S.; Haider, H. and Garvin, K.L.. Mater. Res. Soc. Symp. Proc. Vol. 954, 2007, Materials Research Society 0954-H04-04.  http://www.mrs.org/s_mrs/sec_subscribe.asp?CID=7582&DID=186829&action=detail

 “Thermal Stability of Nanostructurally Stabilized Zirconium Oxide”.  Namavar, F.; Wang,
G.; Cheung, C.L.; Sabirianov, R.F.; Zeng, X. C.; Mei, W.N.; Bai, J.; Brewer, J.R.; Haider, H. and Garvin, K.L. J. Nanotechnology.  18 (41) 415702 (6pp), Oct. 2007.  http://www.iop.org/EJ/abstract/0957-4484/18/41/415702

Namavar, F. Applications of nanotechnology for alternative bearing surfaces in orthopaedics. Proceedings of the 8th Ceramics, Cells and Tissues Meeting-Seminar, Faenza, Italy March, 2003. Volume Edited by A. Ravaglioli and A. Krajewski.. ISTEC-CNR (December 2003).

Aouadi, S.M., Namavar, F., Tobin, E., Finnegan, N., Haasch, R. T., Nilchiani, R. et. al. (2002). Characterization of CrBN films deposited by ion beam assisted deposition. J. Appl. Phys. 91(3), 1040-1045.

Noh, M., Jellison Jr., G. E., Namavar, F., Weitering, H. H. (2002) Isolation of a metallic Si(111)7x7 surface reconstruction via separation by implanted oxygen. Appl. Phys. Lett. 76(6), 733-735.

Hong, M. H., Chung, J., Namavar, F., Pirouz, P. (2000). Defect characterization in 3C-SiC films grown on thin and thick silicon top layers of SIMOX. Materials Science Forum 338-342 (Silicon Carbide and Related Materials Part 1), 525-528.

Hong, M. H., Chung, J., Namavar, F., Pirouz, P. (2000). Defect distribution in 3C-SiC grown on rigid versus compliant substrates. Acta Mater.

Vonsovici, A., Reed, G. T., Josey, M. R., Routley, P. R., Evans, A. G. R., Namavar, F. (1999). 3C(‚)-SiC-on-insulator waveguide structures for modulators and sensor systems. Proceedings of SPIE-The International Society for Optical Engineering 3896(Design, Fabrication, and Characterization of Photonic Devices), 352-359.

Namavar, F., Colter, P. C., Planes, N., Fraisse, B., Pernot, J., Juillaguet, S. et.al. (1999) Investigation of porous silicon as a new compliant substrate for 3C-SiC deposition. Materials Science & Engineering, B: Solid-State Materials for Advanced Technology B61-62, 571-575.