Microsystems for UV-visible and X-ray analysis of protein crystals

L. S.L. Cheung, R. Quick, S. K. Singh, A. Weichsel, W. R. Montfort, Y. Zohar

Research output: Chapter in Book/Report/Conference proceedingConference contribution


polydimethylsiloxane (PDMS) based microsystems have successfully been fabricated and characterized for studying protein crystals utilizing both UV-visible spectroscopy and X-ray crystallography. Transmittance tests have been conducted with PDMS and glass substrates; the measurements indicate that in PDMS, unlike glass, the emerging intensity is higher than 50% of the incident intensity as long as the total optical path is shorter than 100μm. Indeed, both the UV-visible spectrum and X-ray diffraction of a protein crystal enclosed in a PDMS device are almost identical to those of the crystal alone. Hence, PDMS is suitable as substrate material in device fabrication to study protein crystals. In glass, however, the UV-visible spectrum is significantly distorted and the X-ray diffraction pattern is rather weak resulting in poor signal to noise ratio. Furthermore, microsystems integrated with microchannels allowing continuous exchange of buffer solution around the protein crystals have been tested; this would greatly enhance the potential to induce, trap and characterize functional states in proteins.

Original languageEnglish (US)
Title of host publicationProceedings - CIS Workshops 2007, 2007 International Conference on Computational Intelligence and Security Workshops, CISW 2007
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Print)1424409519, 9781424409518
StatePublished - 2007
Event20th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2007 - Kobe, Japan
Duration: Jan 21 2007Jan 25 2007

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
ISSN (Print)1084-6999


Other20th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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