JOURNAL PUBLICATIONS

[1]        M. Christophersen, B. Shapiro, and E. Smela, "Characterization and modeling of PPy bilayer microactuators, part 1: curvature," Sensors and Actuators B, vol. submitted, 2005.

[2]        J. Zheng, M. Christophersen, and P. Bergstrom, "Formation technique for macroporous morphology superlattice," Physica Status Solidi A, vol. 202, pp. 1662-1667, 2005.

[3]        J. Zheng, M. Christophersen, and P. Bergstrom, "Thick macroporous membranes made of p-type silicon," Physica Status Solidi A, vol. 202, pp. 1402-1406, 2005.

[4]        H. Ouyang, M. Christophersen, and P. M. Fauchet, "Enhanced control of porous silicon morphology from macropore to mesopore formation," Physica Status Solidi A, vol. 202, pp. 1396-1401, 2005.

[5]        H. Ouyang, M. Christophersen, and P. M. Fauchet, "Macroporous silicon microcavities for macromolecule detection," Advanced Functional Materials, 2005.

[6]        S. Langa, J. Carstensen, M. Christophersen, K. Steen, S. Loelkes, I. M. Tiginyanu, and H. Föll, "Uniform and non-uniform nucleation of pores during the anodization of Si, Ge, and III-V Semiconductors," Journal of the Electrochemical Society, vol. in press, 2005.

[7]        V. Kochergin, M. Christophersen, and H. Föll, "Surface plasmon enhancement of an optical anisotropy in porous silicon/metal composite," Applied Physics B, vol. 80, pp. 81-87, 2005.

[8]        V. Kochergin, M. Christophersen, and H. Föll, "Adjustable optical anisotropy in porous GaAs," Applied Physics Letters, vol. 86, 2005.

[9]        M. Archer, M. Christophersen, and P. M. Fauchet, "Electrical porous silicon chemical sensor for detection of organic solvents," Sensors and Actuators B, vol. 106, pp. 347-357, 2005.

[10]      V. Kochergin, M. Christophersen, and H. Föll, "Effective medium approach for calculations of optical anisotropy in porous materials," Applied Physics B, vol. 79, pp. 731-739, 2004.

[11]      N. Chaaben, T. Boufaden, M. Christophersen, and B. El Jani, "Structural and optical characterization of GaN grown on porous silicon substrate by MOVPE," Microelectronics Journal, vol. 35, pp. 891-895, 2004.

[12]      M. Archer, M. Christophersen, and P. M. Fauchet, "Macroporous silicon electrical sensor for DNA hybridization detection," Biomedical Microdevices, vol. 6, pp. 203-211, 2004.

[13]      S. Lolkes, M. Christophersen, S. Langa, J. Carstensen, and H. Föll, "Selforganized formation of crystallographically oriented octahedral cavities during electrochemical pore etching," Materials Science and Engineering B, vol. 101, pp. 159-163, 2003.

[14]      S. Langa, I. M. Tiginyanu, J. Carstensen, M. Christophersen, and H. Föll, "Self-organized growth of single crystals of nanopores," Applied Physics Letters, vol. 82, pp. 278-280, 2003.

[15]      S. Langa, M. Christophersen, J. Carstensen, I. M. Tiginyanu, and H. Föll, "Electrochemical pore etching in Ge," Physica Status Solidi A, vol. 195, pp. R4-R6, 2003.

[16]      S. Langa, J. Carstensen, M. Christophersen, I. M. Tiginyanu, and H. Föll, "Voltage oscillations - an emergent property at high density pore growth," Physica Status Solidi A, vol. 197, pp. 186-191, 2003.

[17]      S. Langa, M. Christophersen, J. Carstensen, I. M. Tiginyanu, and H. Föll, "Single crystalline 2D porous arrays obtained by self organization in n-InP," Physica Status Solidi A, vol. 197, pp. 77-82, 2003.

[18]      H. Föll, S. Langa, J. Carstensen, M. Christophersen, and I. M. Tiginyanu, "Pores in III-V semiconductors," Advanced Materials, vol. 15, pp. 183-+, 2003.

[19]      H. Föll, J. Carstensen, S. Langa, M. Christophersen, and I. M. Tiginyanu, "Porous III-V compound semiconductors: formation, properties, and comparison to silicon," Physica Status Solidi A, vol. 197, pp. 61-70, 2003.

[20]      J. C. Claussen, J. Carstensen, M. Christophersen, S. Langa, and H. Föll, "Self-organized pore formation and open-loop control in semiconductor etching," Chaos, vol. 13, pp. 217-224, 2003.

[21]      M. Christophersen, S. Langa, J. Carstensen, I. M. Tiginyanu, and H. Föll, "A comparison of pores in silicon and pores in III-V compound materials," Physica Status Solidi A, vol. 197, pp. 197-203, 2003.

[22]      M. Christophersen, J. Carstensen, K. Voigt, and H. Föll, "Organic and aqueous electrolytes used for etching macro- and mesoporous silicon," Physica Status Solidi A, vol. 197, pp. 34-38, 2003.

[23]      T. Boufaden, N. Chaaben, M. Christophersen, and B. El Jani, "GaN growth on porous silicon by MOVPE," Microelectronics Journal, vol. 34, pp. 843-848, 2003.

[24]      S. Langa, J. Carstensen, I. M. Tiginyanu, M. Christophersen, and H. Föll, "Formation of tetrahedron-like pores during anodic etching of (100) oriented n-GaAs," Electrochemical and Solid State Letters, vol. 5, pp. C14-C17, 2002.

[25]      H. Föll, M. Christophersen, J. Carstensen, and G. Hasse, "Formation and application of porous silicon," Materials Science & Engineering R, vol. 39, pp. 93-141, 2002.

[26]      S. Langa, J. Carstensen, M. Christophersen, H. Föll, and I. M. Tiginyanu, "Observation of crossing pores in anodically etched n-GaAs," Applied Physics Letters, vol. 78, pp. 1074-1076, 2001.

[27]      S. Langa, J. Carstensen, I. M. Tiginyanu, M. Christophersen, and H. Föll, "Self-induced voltage oscillations during anodic etching of n-InP and possible applications for three-dimensional microstructures," Electrochemical and Solid State Letters, vol. 4, pp. G50-G52, 2001.

[28]      M. Christophersen, P. Merz, J. Quenzer, J. Carstensen, and H. Föll, "Deep electrochemical trench etching with organic hydrofluoric electrolytes," Sensors and Actuators A, vol. 88, pp. 241-246, 2001.

[29]      M. Christophersen, J. Carstensen, S. Ronnebeck, C. Jager, W. Jager, and H. Föll, "Crystal orientation dependence and anisotropic properties of macropore formation of p- and n-type silicon," Journal of the Electrochemical Society, vol. 148, pp. E267-E275, 2001.

[30]      S. Langa, I. M. Tiginyanu, J. Carstensen, M. Christophersen, and H. Föll, "Formation of porous layers with different morphologies during anodic etching of n-InP," Electrochemical and Solid State Letters, vol. 3, pp. 514-516, 2000.

[31]      C. Jager, B. Finkenberger, W. Jager, M. Christophersen, J. Carstensen, and H. Föll, "Transmission electron microscopy investigations of the formation of macropores in n- and p-Si(001)/(111)," Materials Science and Engineering B, vol. 69, pp. 199-204, 2000.

[32]      G. Hasse, M. Christophersen, J. Carstensen, and H. Föll, "New insights into Si electrochemistry and pore growth by transient measurements and impedance spectroscopy," Physica Status Solidi A, vol. 182, pp. 23-29, 2000.

[33]      H. Föll, J. Carstensen, M. Christophersen, and G. Hasse, "A new view of silicon electrochemistry," Physica Status Solidi A, vol. 182, pp. 7-16, 2000.

[34]      M. Christophersen, J. Carstensen, A. Feuerhake, and H. Föll, "Crystal orientation and electrolyte dependence for macropore nucleation and stable growth on p-type Si," Materials Science and Engineering B, vol. 69, pp. 194-198, 2000.

[35]      M. Christophersen, P. Merz, J. Quenzer, J. Carstensen, and H. Föll, "A new way to silicon microstructuring with electrochemical etching," Physica Status Solidi A, vol. 182, pp. 561-566, 2000.

[36]      M. Christophersen, J. Carstensen, and H. Föll, "Crystal orientation dependence of macropore formation in p-type silicon using organic electrolytes," Physica Status Solidi A, vol. 182, pp. 103-107, 2000.

[37]      M. Christophersen, J. Cartensen, and H. Föll, "Macropore formation on highly doped n-type silicon," Physica Status Solidi A, vol. 182, pp. 45-50, 2000.

[38]      M. Christophersen, J. Carstensen, and H. Föll, "Crystal orientation dependence of macropore formation in n-type silicon using organic electrolytes," Physica Status Solidi A, vol. 182, pp. 601-606, 2000.

[39]      J. Carstensen, M. Christophersen, and H. Föll, "Pore formation mechanisms for the Si-HF system," Materials Science and Engineering B, vol. 69, pp. 23-28, 2000.

[40]      J. Carstensen, M. Christophersen, G. Hasse, and H. Föll, "Parameter dependence of pore formation in silicon within a model of local current bursts," Physica Status Solidi A, vol. 182, pp. 63-69, 2000.

[41]      M. H. Al Rifai, M. Christophersen, S. Ottow, J. Carstensen, and H. Föll, "Dependence of macropore formation in n-Si on potential, temperature, and doping," Journal of the Electrochemical Society, vol. 147, pp. 627-635, 2000.

[42]      M. H. Al Rifai, M. Christophersen, S. Ottow, J. Carstensen, and H. Föll, "Potential, temperature and doping dependence for macropore formation on n-Si with backside-illumination," Journal of Porous Materials, vol. 7, pp. 33-36, 2000.

 

REFEREED PROCEEDINGS

[1]        M. Urdaneta, L. Yingkai, M. Christophersen, S. Prakash, P. Abshire, and E. Smela, "Integrating conjugated polymer microactuators with CMOS sensing circuitry for studying living cells," SPIE Int. Soc. Opt. Eng, vol. 5759, pp. 232, 2005.

[2]        S. Fanning, Y. Liu, M. Christophersen, M. Düerkop, E. Smela, and B. Shapiro, "Polypyrrole/gold bilayer characterization," SPIE Int. Soc. Opt. Eng, vol. 5759, pp. 292, 2005.

[3]        H. Ouyang, L. DeLouise, M. Christophersen, B. L. Miller, and P. M. Fauchet, "Biosensing with one-dimensional photonic bandgap structure," SPIE Int. Soc. Opt. Eng., vol. 5511, pp. 71, 2004.

[4]        V. Kochergin, M. Christophersen, and P. Swinehart, "Macroporous silicon UV filters for space and terrestrial environments," SPIE Int. Soc. Opt. Eng., vol. 5554, pp. 223, 2004.

[5]        V. Kochergin, M. Christophersen, and P. Swinehart, "Macroporous silicon-based polarization components," SPIE Int. Soc. Opt. Eng., vol. 5515, pp. 132, 2004.

[6]        M. Christophersen, V. Kochergin, and P. Swinehart, "Porous silicon filters for mid- to far-IR range," SPIE Int. Soc. Opt. Eng., vol. 5524, pp. 158, 2004.

[7]        M. Archer, M. Christophersen, P. M. Fauchet, P. Persaud, and K. D. Hirschman, "Electrical porous silicon microarray for DNA hybridization detection," Material Research Society, vol. 782, pp. A7.2, 2004.

[8]        J. C. Claussen, C. Carstensen, M. Christophersen, S. Langa, and H. Föll, "Open-loop control of pore formation in semiconductor etching," PHYSCON03 Proceedings, vol. 3, pp. 895-900, 2003.

[9]        I. M. Tiginyanu, S. Langa, V. V. E. Foca, J. Carstensen, M. Christophersen, and H. Föll, "Properties of 2D and 3D dielectric structures fabricated by electrochemical dissolution of III-V compounds," Material Research Society, vol. 692, pp. K2.7, 2002.

[10]      H. Föll, J. Carstensen, M. Christophersen, and G. Hasse, "Pore etching in compound semiconductors for the production of photonic crystals," Material Research Society, vol. 722, pp. L6.4.1, 2002.

[11]      M. A. Stevens Kalceff, S. Langa, I. M. Tiginyanu, J. Carstensen, M. Christophersen, and H. Föll, "Comparative SEM and cathodoluminescence microanalysis of porous GaP structures," Material Research Society, vol. 638, pp. F5.31, 2000.

[12]      M. Archer, M. Christophersen, and P. M. Fauchet, "Porous silicon electrical biosensors," Material Research Society, vol. 737, pp. F4.2, 2002.

[13]      H. Föll, J. Carstensen, M. Christophersen, and G. Hasse, "A stochastic model for current oscillations in space and time at the silicon electrode," Proceedings of the Electrochemical Society, vol. 36, pp. 7-19, 2000.

[14]      C. Jäger, C. Dieker, W. Jäger, M. Christophersen, J. Carstensen, and H. Föll, "New insights into the formation of macropores in n-Si(001) and p-Si(001),," Int. Phys. Conf. Ser., vol. 164, pp. 507-512, 1999.

 

BOOK CHAPTERS

[1]        S. Langa, I. M. Tginyanu, J. Carstensen, M. Christophersen, and H. Föll, "The way to uniformity in porous III-V compounds via self-organization and lithography patterning," Ordered Porous Nanostructures and Applications (Nanostructure Science and Technology), Editor: R. B. Wehrspohn, Plenum Press, New York, 2005.

[2]        J. Claussen, J. Carstensen, M. Christophersen, S. Langa, and H. Föll, "Self-organized formation of fractal and regular pores in semiconductors," Interface and Transport Dynamics, Editors: H. Emmerich, B. Nestler, M. Schreckenberg, Lecture Notes in Computational Science and Engineering, Spinger, Berlin, 2003.

 

PATENTS

[1]        J. Carstensen, H. Föll, M. Christophersen, and G. Hasse, "Three dimensional photonic crystal," German patent, DE000010014723A1, 2000.

[2]        J. Carstensen, H. Föll, M. Christophersen, and G. Hasse, "In-situ control methode for pore formation in semiconductors," German patent, DE000010011253A1, 2000.

[3]        M. Christophersen, J. Bahr, J. Carstensen, K. Steen, and H. Foell, "Device for etching semiconductors with a large surface area," European, French, German patent, US patent pending, AU002003264239A1, 2003.

[4]        H. Föll, J. Carstensen, and M. Christophersen, "Fabrication of porous membranes," European, French, German patent, US patent pending, DE000010318995A1, 2003.

[5]        V. Kochergin and M. Christophersen, "Active feedback method during semiconductor anodization," US patent, patent pending, 2005.

[6]        V. Kochergin and M. Christophersen, "Mesoporous silicon layers for optical infra red filters," US patent, patent pending, 2005.

[7]        V. Kochergin and M. Christophersen, "Negative refractive index and opto-magnetic materials and method of fabricating," US patent, patent pending, 2005.

[8]        H. Ouyang, M. Christophersen, and P. M. Fauchet, "Macroporous micro-cavities for bio-sensing," US patent, patent pending, 2005.

 

TALKS

Invited talks

[1]        "Self-induced voltage oscillations and diameter modulations during pore formation in Si and InP," Material Research Society Spring meeting, 21- 25 April, San Francisco, CA, 2003.

 

Oral conference presentations

[1]        "Integrating conjugated polymer microactuators with CMOS sensing circuitry for studying living cells," SPIE Conference  5759, 7-10 March, San Diego, CA, 2005.

[2]        "Meso- and macroporous silicon as far-IR-filters," SPIE Annual Meeting, 2-6 August, Denver, CO, 2004.

[3]        "Properties of organic electrolytes and their influence on macropore formation in p-type silicon," Porous Semiconductor Science and Technology, 10-15 March, Tenerife, Spain, 2002.

[4]        "Properties of 2D and 3D dielectric structures fabricated by electrochemical dissolution of III-V compounds," MRS conference, vol. Material Science Society Fall Meeting, 26-30 November, Boston, MA, 2001.

[5]        "Pore etching in semiconductors for the production of photonic crystals," International Conference on Materials for Advanced Technologies, 1-6 July, Singapore, Singapore, 2001.

[6]        "Applications of electrochemically produced macropores in silicon," International Conference on Materials for Advanced Technologies, 1 - 6 July 2001, Singapore, Singapore, 2001.

[7]        "A new way to silicon micro-structuring with electrochemical etching," Porous Semiconductor Science and Technology, 12-17 March, Madrid, Spain, 2000.