Results 41 to 50 of about 1,953,550 (296)

Temperature dependent photoluminescence of organic semiconductors with varying backbone conformation [PDF]

, 2002
We present photoluminescence studies as a function of temperature from a series of conjugated polymers and a conjugated molecule with distinctly different backbone conformations.
Chandrasekhar, H. R., Chandrasekhar, M., de Freitas, P. Scandiucci, Guentner, R., Guha, S., Martin, C. M., Rice, J. D., Scherf, U., Yau, Y. T.   +8 more
core   +2 more sources

Blue-shifting, asymmetric quantum wells

Electronics Letters, 1996
Asymmetric, (100) blue-shifting quantum wells have been fabricated using δ-doped layers at each well-barrier interface. The photoluminescence peaks depend on the δ-dopant concentration as predicted, and blue shifts of 38 nm have been measured for a factor 20 increase in optical pump power.
C. Cooper, D.I. Westwood, P. Blood
openaire   +1 more source

Vibrio azureus emits blue-shifted light via an accessory blue fluorescent protein [PDF]

FEMS Microbiology Letters, 2012
Luminous marine bacteria usually emit bluish-green light with a peak emission wavelength (λ(max) ) at about 490 nm. Some species belonging to the genus Photobacterium are exceptions, producing an accessory blue fluorescent protein (lumazine protein: LumP) that causes a blue shift, from λ(max)  ≈ 490 to λ(max)  ≈ 476 nm.
Susumu, Yoshizawa, Hajime, Karatani, Minoru, Wada, Kazuhiro, Kogure   +3 more
openaire   +2 more sources

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Defect Modes Generated in a Stack of Spin-Coated Chiral Liquid Crystal Layers

Crystals
Nematic chiral liquid crystals (CLCs) are characterized by a helical arrangement of nematic LC molecules. A layer of CLC typically exhibits an optical reflection band due to Bragg reflection in the helical structure.
Frederik Van Acker, Bo-Han Lin, Chun-Ta Wang, Kristiaan Neyts, Jeroen Beeckman   +4 more
doaj   +1 more source

Magnetic blue shift of Mott gaps enhanced by double exchange

Physical Review Research, 2021
A substantial energy gap of charge excitations induced by strong correlations is the characteristic feature of Mott insulators. We study how the Mott gap is affected by long-range antiferromagnetic order. Our key finding is that the Mott gap is increased
Mohsen Hafez-Torbati, Davide Bossini, Frithjof B. Anders, Götz S. Uhrig   +3 more
doaj   +1 more source

Near field spectral dispersion of dipole radiation: The maximum red and blue shifts, and the near and far field boundary

Results in Optics, 2021
Spectral dispersion of dipole radiation in near field zone is studied. Spectral changes are demonstrated using polychromatic incident light of Gaussian spectral profile as test examples. Both red and blue shifts are possible.
Mufei Xiao
doaj   +1 more source

Terahertz intersubband absorption in non-polar m-plane AlGaN/GaN quantum wells

, 2014
We demonstrate THz intersubband absorption (15.6-26.1 meV) in m-plane AlGaN/GaN quantum wells. We find a trend of decreasing peak energy with increasing quantum well width, in agreement with theoretical expectations.
Edmunds, C., Malis, O., Manfra, M. J., Shao, J., Shirazi-HD, M.   +4 more
core   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Macroscopic effects in generation of attosecond XUV pulses via high-order frequency mixing in gases and plasma

New Journal of Physics
We theoretically study the generation of attosecond XUV pulses via high-order frequency mixing (HFM) of two intense generating fields, and compare this process with the more common high-order harmonic generation (HHG) process.
V A Birulia, M A Khokhlova, V V Strelkov
doaj   +1 more source