Theoretical study of the size confinement effect in linear π-conjugated oligomers

2007 ◽  
Vol 342 (1-3) ◽  
pp. 191-200 ◽  
Author(s):  
Mariusz Bednarz ◽  
Peter Reineker ◽  
Elena Mena-Osteritz ◽  
Peter Bäuerle
Keyword(s):  
Theoretical Study ◽  
Confinement Effect ◽  
Conjugated Oligomers ◽  
Size Confinement

Cell-size confinement effect on protein diffusion in crowded poly(ethylene)glycol solution

2018 ◽  
Vol 20 (13) ◽  
pp. 8842-8847 ◽  
Author(s):  
Chiho Watanabe ◽  
Miho Yanagisawa
Keyword(s):  
Ethylene Glycol ◽  
Cell Size ◽  
Molecular Diffusion ◽  
Macromolecular Crowding ◽  
Confinement Effect ◽  
Protein Diffusion ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Glycol Solution ◽  
Size Confinement

Micrometric membrane confinements and macromolecular crowding synergistically regulate molecular diffusion.

The Size Confinement Effect for Eu3+ Concentration Quenching and Energy Transfer in YVO4 Nanocrystal

2016 ◽  
Vol 16 (4) ◽  
pp. 3772-3776 ◽  
Author(s):  
Qingyu Meng ◽  
Jiaqi Dai ◽  
Wenjun Sun ◽  
Changwen Wang
Keyword(s):  
Energy Transfer ◽  
Exchange Interaction ◽  
Electric Dipole ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Confinement Effect ◽  
Precipitation Method ◽  
Range Interaction ◽  
Operating Range ◽  
Size Confinement

YVO4:Eu3+ nanocrystal powders (∼30 nm) with different doping concentrations were prepared using a precipitation method. Bulky powders (∼500 nm) were obtained by annealing the nanopowders at high temperature. The concentration quenching of luminescent centers and energy transfer in YVO4: Eu3+ powders were investigated. It was found that quenching concentration for Eu3+ 5D0→7F2 transition emission in nanopowders is distinctly higher than that in bulk powders. The type of energy transfer that caused concentration quenching was identified to be electric dipole–dipole interaction in bulk powders and exchange interaction in nanopowders. The electric dipole–dipole interaction is a long-range interaction (operating range of several nanometers). The size confinement effect of boundary in nanoparticles has obvious inhibitory effect on electric dipole–dipole interaction, and hardly affect the exchange interaction which is a short-range interaction (operating range several angstroms). The electric dipole–dipole interaction is restrained by particle boundary in nanopowders. So energy transfer of Eu3+ ions in nanomaterials is dominated by exchange interaction, and quenching concentration of nanomaterials is higher than in bulky materials.

Theoretical study on submicron particle escape reduced by magnetic confinement effect in low inlet speed electrostatic cyclone precipitators

2018 ◽  
Vol 339 ◽  
pp. 1005-1011 ◽  
Author(s):  
Jian-Ping Zhang ◽  
Zhen-Ting Zha ◽  
Peng Che ◽  
Wei-Guo Pan ◽  
Dan-Mei Hu ◽  
...  
Keyword(s):  
Theoretical Study ◽  
Magnetic Confinement ◽  
Confinement Effect ◽  
Submicron Particle
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