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Determination of Crystal Structures01:29

Determination of Crystal Structures

135
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
135

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Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
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Two-dimensional protein crystals for solar energy conversion.

Patrick O Saboe1, Carolyn E Lubner, Nicholas S McCool

  • 1Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.

Advanced Materials (Deerfield Beach, Fla.)
|August 27, 2014
PubMed
Summary

We created a novel photo-electrochemical device using two-dimensional crystals of Photosystem I (PSI). This device achieved a significant photocurrent enhancement, demonstrating potential for efficient light energy conversion.

Keywords:
bioelectrochemistrybiomimetic membranesphotovoltaicsself-assemblytwo dimensional crystals

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Area of Science:

  • Biophysics
  • Materials Science
  • Renewable Energy

Background:

  • Photosynthetic protein crystals offer high-density, aligned reaction centers.
  • Photosystem I (PSI) is a robust light-harvesting protein with potential for bio-electronic devices.

Purpose of the Study:

  • To reconstitute Photosystem I into a 2D crystal and integrate it into a photo-electrochemical device.
  • To enhance the photocurrent output of the device using conjugated oligoelectrolytes.

Main Methods:

  • Reconstitution of Photosystem I into lipid-based 2D crystals.
  • Integration of these crystals into a photo-electrochemical device.
  • Formation of a supporting conductive bilayer using conjugated oligoelectrolytes.

Main Results:

  • A 4-fold photocurrent enhancement was measured.
  • The device produced a high photocurrent of approximately 600 μA per mg of PSI.
  • Successful integration of 2D PSI crystals into a functional device.

Conclusions:

  • Two-dimensional photosynthetic protein crystals can be effectively integrated into photo-electrochemical devices.
  • The use of conjugated oligoelectrolytes significantly enhances device performance.
  • This approach shows promise for efficient light energy conversion technologies.