Ferencz Sandor Denes Associate Professor Emeritus Address/E-mail Program Affiliations Education Fields of Interest Publications Awards & Honors Courses: Summary >>> Extended Homepage <<<

Contact Information

Primary Address: Room 101 1410 Engineering Drive Madison, WI 53706 Tel: 608/265-8266 Fax: 608/262-3632 E-mail: denes@engr.wisc.edu

Secondary Address: Room 229 Biological Systems Engineering 460 Henry Mall Madison, WI 53706 Tel: 608/262-0605 Fax: 608/262-1228

Program Affiliations

• Materials Science Program
• Biological Systems Engineering
• Food Research Institute
• Food Science

Education

• BS, 1965, “Gh. Asachi” Polytechnical Institute, Jassy-Romania
• PhD, 1972, “Petru Poni” Institute of Macromolecular Chemistry, Jassy-Romania
• Post Doc. Training, 1974, University of Miami-Florida, Institute for Molecular and Cellular Evolution

Fields of Interest

• Plasma-enhanced synthesis and surface modification of materials
• Immobilization of active biomolecules onto plasma-functionalized surfaces
• Deposition of anti-fouling and anti-microbial surface layers
• Plasma-enhanced synthesis of nanoparticle systems
• Development of novel non-equilibrium plasma tools.

Publications

Selected Publications:

Papers Published In, or Accepted by, Refereed Journals

1. Z. Q. Hua, R. Sitaru, F. Denes, and R. A. Young (P), Mechanisms of Oxygen- and Argon- RF-Plasma Induced Surface Chemistry of Cellulose, Plasmas and Polymers 2(3), 196-220 (1998).
2. S. D. Lee, M. Sarmadi, F. Denes, and J. L. Shohet, Surface Modification of Polypropylene under Argon and Oxygen-RF-Plasma Conditions, Plasmas and Polymers 2(3), 173-194 (1998).
3. R. Mahlberg, H. E. M. Niemi, F. Denes, and R.M. Rowell, Effect of Oxygen and Hexamethyldisiloxane Plasma on Morphology, Wettability and Adhesion Properties of Polypropylene and Lignocellulosics, International Journal of Adhesion and Adhesives 18, 283-297, (1998).
4. R. Gamapathy, M. Sarmadi, and F. Denes, Immobilization of α-Chymotrypsin on Oxygen-RF-Plasma Functionalized PET and PP Surfaces, Journal of Biomaterials Science, Polymer Edition 9(4), 389, (1998).
5. F. Denes, R. Sitaru and R. A. Young, Template Polymerization from Cold-Plasma-Enhanced Crystallinity Polymer Surfaces, Journal of Photopolymer, Science and Technology 11(2), 299, (1998).
6. F. Denes and Z. Q. Hua, Synthesis of Teflon-like Macromolecular Compounds from Dodecafluorocyclohexane and Octadecafluorodecaline under RF-Cold-Plasma Conditions, J. Appl. Polym. Sci. 71, 1627-1639 (1999).
7. F. Denes, S. Manolache and R. A. Young, Synthesis and Surface Functionalization under Cold-Plasma Conditions, J. Photopolymer Science and Technology 12 (1), 27-38 (1999).
8. S. D. Lee, S. Manolache, M. Sarmadi and F. Denes, Deposition of High Fluorine Content Macromolecular Thin Layers under Continuous-Flow-System Corona Discharge Conditions, Polymer Bulletin 43, 409-416 (1999).
9. R. Mahlberg, H. E. M. Niemi, F. S. Denes, and R. M. Rowell (P), Application of AFM on the Adhesion Studies of Oxygen-Plasma-Treated Polypropylene and Lignocellulosics, Langmuir 15(8), 2985-2992 (1999).
10. A. R. Denes, M. Tsabalala, R. Rowell, F. Denes, and R. A. Young, Hexamethyl Disiloxane-Plasma Coating of Wood Surfaces for Creating Water Repellent Characteristics, Holzforschung 53, 318-326 (1999).
11. S. Manolache, M. Sarfaty and F. Denes, RF-Frequency Effects on Molecular Fragmentation, Plasma Sources Science and Technology 9, 37-44 (2000).
12. C. Naum, S. Manolache and F. Denes, Synthesis of Teflon-like Thin Layers under Perfluoro-1-butanesulfonyl Fluoride / Methane RF-Plasma Environments, Langmuir 16(2), 749-753 (2000).
13. I. I. Negulescu, S. Despa, J. Chen, B. Collier, M. Despa, A. Denes, M. Sarmadi, and F. Denes, Characterizing Polyester Fabrics Treated in Electrical Discharges of Radio-Frequency Plasma, Textile Res. J. 70(1), 1-7 (2000).
14. A. J. Martínez, S. Manolache, V. González, R. A. Young and F. Denes, Immobilized Biomolecules on Plasma Functionalized Cellophane. I. Covalently Attached α-Chymotrypsin, J. Biomaterials Science. Polymer Edition 11(4), 415-438 (2000).
15. S. Manolache and F. Denes, Synthesis of Nanoparticles under Cold-Plasma Conditions, J. Photopolymer Sci. Technol. 13(1), 51-62 (2000).
16. R. Ganapathy, S. Manolache, M. Sarmadi, W.  J. Simonsick Jr. and F. Denes, Immobilization of Active α-Chymotrypsin on RF-Plasma-Functionalized Polymer Surfaces, J. of Applied Polymer Science 78(10), 1783-1796 (2000).
17. D. Feldman, F. Denes, Z. Zeng, A. R. Denes and D. Banu, Propylene Fiber-Matrix Bonds in Cementitious Composites, J. Adhezion Sci. Technol. 14(13), 1705-1721 (2000).
18. J. C. Volin, F. S. Denes, R. A. Young and S. M. T. Park, Modification of Seed Germination through Cold-Plasma Chemistry Technology, Crop Sci. 40, 1706-1718 (2000).
19. A. R. Denes, E. B. Somers, A. C. L. Wong, and F. Denes, 12-Crown-4-Ether and Tri(ethylene glycol) Dimethyl-Ether Plasma-Coated Stainless Steel Surfaces and Their Ability to Reduce Bacterial Biofilm Deposition, J. Appl. Polym. Sci. 81, 3425-3438 (2001).
20. Y. C. Ma, S. Manolache, M. Sarmadi, and F. Denes, Plasma-Enhanced Synthesis of Maltodextrin-Polydimethylsiloxane Graft-Copolymers, J. Appl. Polymer Sci. 80(8), 1120-1129 (2001).
21. V. A. Shamamian, D. D. Hinshelwood, D. C. Guerin, F. S. Denes, and S. Manolache, Mass Spectrometric Characterization of Pulsed Inductively Coupled Plasmas for Deposition of Thin Polyethylene Glycol-like Polymer Films, J. Photopolymer Sci. Technol. 14 (2001).
22. S. Manolache, E. B. Somers, A. C. L. Wong, V. Shamamian and F. Denes, Dense Medium Plasma Environments: A New Approach for the Disinfection of Water, Environmental Science and Technology 18, 3780-3785 (2001).
23. R. Ganapathy, S. Manolache, M. Sarmadi, and F. Denes, Immobilization of Papain on Cold-Plasma-Functionalized Polyethylene and Glass Surfaces, J. Biomater. Sci. Polymer Edn 12(9), 1027-1049 (2001).
24. S. Alvarez-Blanco, S. Manolache, and F. Denes, A Novel Plasma-enhanced Way for Surface-Functionalization of Polymeric Substrates, Polymer Bulletin 47, 329-336 (2001).
25. Y. J. Wu, A. J. Griggs, J. Jen, S. Manolache, F. Denes and R. B. Timmons, Pulsed Plasma Polymerization of Cyclic Ethers: Production of Biologically Non-Fouling Surfaces, Plasmas and Polymers 6(3), 123-144 (2001).
26. H. T. Sahin, S. Manolache, R. A. Young and F. Denes, Surface Fluorination of Paper under CF₄ – RF Plasma Environments, Cellulose 9(2), 171-181 (2002).
27. L. G. Paterno, S. Manolache, and F. Denes, Synthesis of Polyaniline-type Thin Layer Structures Under Low-Pressure RF-Plasma Conditions, Synthetic Metals 130(1), 85-97 (2002).
28. A. R. Martin, S. Manolache, F. S. Denes, L. H. C. Mattoso, Functionalization of sisal fibers and high-density polyethylene by cold plasma treatment, Journal of Applied Polymer Science 85(10), 2145-2154 (2002).
29. G. Toriz, F. Denes and R. A. Young, Lignin-Polypropylene Composites. Part 1: Composites from Unmodified Lignin and Polypropylene, Polymer Composites 23(5), 806-813 (2002).
30. L. E. Cruz-Barba, S. Manolache, and F. Denes, Novel Plasma Approach for the Synthesis of Highly Fluorinated Thin Surface Layers, Langmuir 18, 9393-9400 (2002).
31. S. Alvarez-Blanco, S. Manolache, and F. Denes, Synthesis of Polyaniline Using Horseradish Peroxidase Immobilized on Plasma-Functionalized Polyethylene Surfaces as Initiator, Journal of Applied Polymer Science 88(2), 369-379 (2003).
32. F. S. Denes, S. Manolache, Y. Ma, V. Shamamian, B. Ravel, and S. Prokes, Dense Medium Plasma Synthesis of Carbon/Iron-based Magnetic Nanoparticle Systems, J. Appl. Phys. 94(5), 3498-3508 (2003).
33. L. E. Cruz-Barba, S. Manolache and F. Denes, Generation of Teflon-like layers on cellophane surfaces under atmospheric pressure non-equilibrium SF6-plasma environments, Polymer Bulletin 50, 381-387 (2003).
34. S. Manolache, V. Shamamian and F. Denes, DMP Plasma-Enhanced Decontamination of Water of Aromatic Compounds, Journal of Environmental Engineering (submitted September 20, 2001; accepted 2002 - EE/2001/022956).

Papers That Have Been Submitted to Referred Journals

1. H. Jiang, S. Manolache, A.C.L. Wong and F. Denes, Plasma-enhanced Deposition of Silver Nanoparticles onto Polymer and Metal Surfaces for the Generation of Antimicrobial Characteristics, Journal of Applied Polymer Science (submitted January 15, 2003).
2. Y. Wang, S. Manolache, A. C. L. Wong, and F. S. Denes, Cold Plasma Synthesis of Poly(ethylene glycol)-like Layers on Stainless Steel Surfaces to Reduce Attachment and Biofilm Formation by Listeria Monocytogenes, Journal of Food Science (accepted October 6, 2003).
3. L. E. Cruz-Barba, S. Manolache, K. Sridharan and F. S. Denes, Novel Approach for the Synthesis of Hard-carbon Layers using Non-equilibrium Plasmas, Langmuir (submitted September 2003).
4. F. Denes and S. Manolache, Macromolecular Plasma-Chemistry an Emerging Field of Polymer Science, Progress in Polymer Science (to be submitted).
5. S. Manolache, M. Kuzuya, and F. Denes, Fluorination of C₆₀ Fullerene under RF-Fluorine-Plasma Environments, Polymer Bulletin (to be submitted).
6. F. S. Denes and S. Manolache, Atmospheric-pressure Plasma in Gas/Vapor Bubbles Dispersed in Dielectric Liquid Media, (to be submitted).

Patent and Patent Disclosures Issued

1. Methods for Reactions in Dense-Medium Plasmas and Products Formed Thereby — Plasma Polymerization. F. Denes, R. A. Young, and Z. Q. Hua. 06/01/1999, US 5908539.
2. Polymeric Thin Layer Materials — Uniform, Clear, Durable Films with Thermal Stability, Chemical Inertness and Transparency. F. Denes, A. M. Sarmadi, J. L. Shohet and R. A. Young. 02/18/1997, US 5604038.
3. Fiber-Reinforced Cementitious Composites. F. Denes, R. A. Young, D. Feldman, Z. Q. Hua, and Z. Zheng. 01/06/1998, US 5705233.
4. Outside-Chamber Sealing-Roller-System for Surface Treatment Gas Reactors. F. Denes, and R. J. Sandberg. 04/25/2000, US 6054018.
5. Sealing-Roller-System for Surface Treatment Gas Reactors. F. Denes, R. J. Sandberg (E) and A.M. Sarmadi. 07/04/2000, US 6082292.
6. Plasma-Aided Treatment of Surfaces Against Bacterial Atachment and Biofilm Deposition. A. Denes, F. Denes, E. Sommers and A. Wong. 08/01/2000, US 6096564.
7. Process for the Intercalation of Spacer Molecules Between Substrates and Active Biomolecules, F. Denes, S. Manolache, M. Sarmadi, R. A. Young, R. Ganapathy and A. J. Martinez-Gomez, 06/11/2002, US 6402899.

Books or Conference Proceedings Edited:  Invited Papers in Conference Proceedings and Invited Chapters in Books

1. J. Rowell, S. Manolache, L. H. C. Mattoso, M. Sarfaty, R.A.Young, and F. Denes, Advanced Materials from SiCl₂H₂-RF-Plasma Functionalized Thermoplastic and Lignocellulosis Substrates.  (I) Sisal-Polypropylene-Based Composites, Proceedings of the Second International Symposium on Natural Polymers and Composites ISNaPol98, May 10-13, p. 45, Atibaia-SP, Brazil (1998).
2. H. Seliger, M. Hinz, P. Jaisankar, F. Eisenbeib, S. Manolache, F. Denes, S. Gura, B. Nitzan, and S. Margel, Polymer-Supported Nucleic Acids for Applications in Biomedicine, Proceedings of the Second International Symposium on Natural Polymers and Composites ISNaPol98, May 10-13, p. 45, Atibaia-SP, Brazil (1998).
3. F. Denes and R. A. Young, Surface Modification of Polysaccharides under Cold Plasma Conditions, in: Severian Dumitriu (Ed.), Structural Diversity and Functional Versatility of Polysaccharides, Marcel Dekker Inc., New York, Basel, Hong Kong (1998).
4. G. Toriz, F. Denes and R. A. Young, Plasma Modification of Lignin, in: Wolfgang G. Glasser, Robert A. Northey and Tor P. Schultz (Eds.), Lignin: Historical, Biological, and Materials Perspectives, ACS Symposium Series 742, Washington DC, p. 367-389 (2000).
5. F. Denes and S. Manolache, Immobilization of Active Biopolymers from Cold-Plasma-Functionalized Surfaces for the Creation of Molecular-Recognition and Molecular Manufacturing Systems (Chapter 12), in: S. Dumitriu (Ed), Polymeric Biomaterials: Second Edition, Revised and Expanded, Marcel Dekker Inc., New York, p. 239-290 (2002).
6. F. Denes, S. Manolache, and L. E. Cruz-Barba, Low-pressure Versus Atmospheric-pressure Non-equilibrium Plasma-enhanced Surface Modification of Cellulosic Substrates, 6th Pacific Rim Bio-based Composites Symposium, November 10-13, p. 517-527, Portland OR (2002).

Selected Awards, Honors and Societies

• Fulbright Fellow, 1974-1975
• Member of ACS
• Photopolymer Science and Technology Award, Japan, Chiba (2000)

Courses:

• BSE — 875: Non-Conventional Modification of Macromolecular Material Surfaces

This graduate level course covers topics of plasma chemistry, plasma diagnostics, bond energies, plasma-enhanced reaction mechanisms, polymer-synthesis and characteristics, plasma-enhanced surface modification of inorganic and organic macromolecular surfaces, mechanical energy-, UV radiation- and ultra sound-enhanced surface modification reactions, and characterization of modified polymer surfaces. Applications for the generation of anti-fouling thin layers on various material surfaces, synthesis of surfaces that kill bacteria on contact, immobilization of active biomolecules onto plasma-functionalized surfaces, including enzymes and DNA, and synthesis of nanoparticle systems under cold plasma environments are discussed. Emerging novel atmospheric plasma tools with potential application in surface-modification processes are also presented.

Summary

Research Directions of the Candidate's Group:

General Plasma Chemistry

• Synthesis of nano-particle- and  hybrid nano-particle systems under Dense Medium Plasma (DMP) conditions.
• Fundamental studies of DMP plasma-induced reaction mechanisms (Decontamination of potable, bilge and gray water —Navy-ship applications).
• Atmospheric pressure, non-equilibrium plasma modification of Otto and Diesel gasoline composition.
• Investigation of low- and atmospheric pressures-induced reaction mechanisms; simulation of molecular fragmentation and recombination.
• Plasma-enhanced conversion of thin layer, liquid-phase high molecular weight polymers into 3D solid-state networks.

Research Directly Related to Food Safety Issues

• Plasma-enhanced deposition of antifouling macromolecular layers and colloidal Silver Particles on material surfaces usually involved in food processing technologies.
• Plasma-mediated generation of surfaces that kill bacteria on contact.
• Array Electrode Reactor Plasma Disinfection of surfaces that are in Contact with Ready to Eat Meat Products.
• Disinfection and Decontamination of Water Using Dense Medium Plasma Technologies.
• Immobilization of active biomolecules (e.g. enzymes) on plasma-functionalized organic and inorganic substrate surfaces for the design and development of biosensors with applications in food processing industries.
• Design and development of novel atmospheric pressure plasma installations for an efficient disinfection and decontamination of material surfaces, water and air (AER, Flat, Bubble, Capillary plasma reactors).
• Synthesis of electrically conductive organic polymeric thin layers for the development of electric signals-based transducers for biosensor applications.
• Synthesis of Teflon-like surfaces on various polymer surfaces with potential application in Food-packaging Technologies.
• Deposition of Hard-carbon (Diamond-like) Thin Layers Under Low- and Atmospheric-pressure Non-equilibrium Plasma Environments.
• Synthesis of Sole and Hybrid Nanoparticle Systems, Including Magnetic Nanoparticle Systems, Using DMP Technologies with Applications in Catalysis and Localized Targeted Drug-delivery techniques.

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