1. Effects of quantum dot charging on photoelectron processes and solar cell characteristics

    Solar Energy Materials and Solar Cells 117:638 (2013)

    We present theoretical and experimental analysis of photocarrier kinetics in quantum dot (QD) solar cells. The measurements of the J–V characteristics reveal strong effects of QD charging by selective doping of the interdot space on the solar cell characteristics. We demonstrate that c...
  2. Effects of quantum dot charging on photoelectron processes and solar cell characteristics

    Solar Energy Materials and Solar Cells 117:638 (2013)

    We present theoretical and experimental analysis of photocarrier kinetics in quantum dot (QD) solar cells. The measurements of the J–V characteristics reveal strong effects of QD charging by selective doping of the interdot space on the solar cell characteristics. We demonstrate that c...
  3. Effects of quantum dot charging on photoelectron processes and solar cell characteristics

    Solar Energy Materials and Solar Cells 117:638 (2013)

    We present theoretical and experimental analysis of photocarrier kinetics in quantum dot (QD) solar cells. The measurements of the J–V characteristics reveal strong effects of QD charging by selective doping of the interdot space on the solar cell characteristics. We demonstrate that c...
  4. Effects of quantum dot charging on photoelectron processes and solar cell characteristics

    Solar Energy Materials and Solar Cells 117:638 (2013)

    We present theoretical and experimental analysis of photocarrier kinetics in quantum dot (QD) solar cells. The measurements of the J–V characteristics reveal strong effects of QD charging by selective doping of the interdot space on the solar cell characteristics. We demonstrate that c...
  5. Role of cis-acting sites in stimulation of the phage λ P(RM) promoter by CI-mediated looping.

    Journal of Bacteriology 195(15):3401 (2013) PMID 23708136 PMCID PMC3719544

    The lysogenic state of phage λ is maintained by the CI repressor. CI binds to three operators each in the right operator (O(R)) and left operator (O(L)) regions, which lie 2.4 kb apart. At moderate CI levels, the predominant binding pattern is two dimers of CI bound cooperatively at each regulat...
  6. Role of cis-acting sites in stimulation of the phage λ P(RM) promoter by CI-mediated looping.

    Journal of Bacteriology 195(15):3401 (2013) PMID 23708136 PMCID PMC3719544

    The lysogenic state of phage λ is maintained by the CI repressor. CI binds to three operators each in the right operator (O(R)) and left operator (O(L)) regions, which lie 2.4 kb apart. At moderate CI levels, the predominant binding pattern is two dimers of CI bound cooperatively at each regulat...
  7. Strong enhancement of solar cell efficiency due to quantum dots with built-in charge.

    Nano Letters 11(6):2311 (2011) PMID 21545165

    We report a 50% increase in the power conversion efficiency of InAs/GaAs quantum dot solar cells due to n-doping of the interdot space. The n-doped device was compared with GaAs reference cell, undoped, and p-doped devices. We found that the quantum dots with built-in charge (Q-BIC) enhance elec...
  8. Strong enhancement of solar cell efficiency due to quantum dots with built-in charge.

    Nano Letters 11(6):2311 (2011) PMID 21545165

    We report a 50% increase in the power conversion efficiency of InAs/GaAs quantum dot solar cells due to n-doping of the interdot space. The n-doped device was compared with GaAs reference cell, undoped, and p-doped devices. We found that the quantum dots with built-in charge (Q-BIC) enhance elec...
  9. Stability and instability in the lysogenic state of phage lambda.

    Journal of Bacteriology 192(22):6064 (2010) PMID 20870769 PMCID PMC2976446

    Complex gene regulatory circuits exhibit emergent properties that are difficult to predict from the behavior of the components. One such property is the stability of regulatory states. Here we analyze the stability of the lysogenic state of phage λ. In this state, the virus maintains a stable as...
  10. Stability and instability in the lysogenic state of phage lambda.

    Journal of Bacteriology 192(22):6064 (2010) PMID 20870769 PMCID PMC2976446

    Complex gene regulatory circuits exhibit emergent properties that are difficult to predict from the behavior of the components. One such property is the stability of regulatory states. Here we analyze the stability of the lysogenic state of phage λ. In this state, the virus maintains a stable as...
  11. Evolution of complex gene regulatory circuits by addition of refinements.

    Current Biology 20(17):R724 (2010) PMID 20833317

    How do complex gene regulatory circuits evolve? These circuits involve many interacting components, which work together to specify patterns of gene expression. They typically include many subtle mechanistic features, but in most cases it is unclear whether these features are essential for the ci...
  12. Evolution of complex gene regulatory circuits by addition of refinements.

    Current Biology 20(17):R724 (2010) PMID 20833317

    How do complex gene regulatory circuits evolve? These circuits involve many interacting components, which work together to specify patterns of gene expression. They typically include many subtle mechanistic features, but in most cases it is unclear whether these features are essential for the ci...
  13. Evolution of Complex Gene Regulatory Circuits by Addition of Refinements

    Current Biology 20(17):R724 (2010)

    How do complex gene regulatory circuits evolve? These circuits involve many interacting components, which work together to specify patterns of gene expression. They typically include many subtle mechanistic features, but in most cases it is unclear whether these features are essential for t...
  14. RecA-dependent cleavage of LexA dimers.

    Journal of Molecular Biology 377(1):148 (2008) PMID 18234215 PMCID PMC2277360

    A critical step in the SOS response of Escherichia coli is the specific proteolytic cleavage of the LexA repressor. This reaction is catalyzed by an activated form of RecA, acting as a co-protease to stimulate the self-cleavage activity of LexA. This process has been reexamined in light of evide...
  15. RecA-Dependent Cleavage of LexA Dimers

    Journal of Molecular Biology 377(1):148 (2008)

    A critical step in the SOS response of Escherichia coli is the specific proteolytic cleavage of the LexA repressor. This reaction is catalyzed by an activated form of RecA, acting as a co-protease to stimulate the self-cleavage activity of LexA. This process has been reexamined in li...
  16. Cooperative DNA binding by CI repressor is dispensable in a phage lambda variant.

    PNAS 104(45):17741 (2007) PMID 17962420 PMCID PMC2077068

    Complex gene regulatory circuits contain many interacting components. In principle, all of these components and interactions may be essential to the function of the circuit. Alternatively, some of them may be refinements to a simpler version of the circuit that improve its fitness. In this work,...
  17. Cooperative DNA binding by CI repressor is dispensable in a phage lambda variant.

    PNAS 104(45):17741 (2007) PMID 17962420 PMCID PMC2077068

    Complex gene regulatory circuits contain many interacting components. In principle, all of these components and interactions may be essential to the function of the circuit. Alternatively, some of them may be refinements to a simpler version of the circuit that improve its fitness. In this work,...
  18. Conservation and diversity in the immunity regions of wild phages with the immunity specificity of phage lambda.

    Molecular Microbiology 64(1):232 (2007) PMID 17376085

    The gene regulatory circuitry of phage lambda is among the best-understood circuits. Much of the circuitry centres around the immunity region, which includes genes for two repressors, CI and Cro, and their cis-acting sites. Related phages, termed lambdoid phages, have different immunity regions,...
  19. Conservation and diversity in the immunity regions of wild phages with the immunity specificity of phage lambda.

    Molecular Microbiology 64(1):232 (2007) PMID 17376085

    The gene regulatory circuitry of phage lambda is among the best-understood circuits. Much of the circuitry centres around the immunity region, which includes genes for two repressors, CI and Cro, and their cis-acting sites. Related phages, termed lambdoid phages, have different immunity regions,...
  20. A synthetic phage lambda regulatory circuit.

    PNAS 103(50):19045 (2006) PMID 17135356 PMCID PMC1748174

    Analysis of synthetic gene regulatory circuits can provide insight into circuit behavior and evolution. An alternative approach is to modify a naturally occurring circuit, by using genetic methods to select functional circuits and evolve their properties. We have applied this approach to the cir...