نتایج جستجو برای: electron correlation

تعداد نتایج: 687495  

Journal: :International Journal of Modern Physics B 2000

Journal: :Journal of Electron Spectroscopy and Related Phenomena 2005

Journal: :International Journal of Modern Physics B 2003

Journal: :Macromolecules 2008
Tuna Yucel Chris M Micklitsch Joel P Schneider Darrin J Pochan

Triggered hydrogelation of MAX1 peptide, (VK)(4)-V(D)PPT-(KV)(4)-NH(2), proceeds through peptide intramolecular folding into beta-hairpins and concomitant self-assembly into branched clusters of well-defined (uniform, 3 nm cross section), semiflexible, beta-sheet-rich nanofibrils. Cryogenic transmission electron microscopy indicates that dangling fibrils extend from one growing cluster to anoth...

Journal: :Nanotechnology 2013
Mustafa Lotya Aliaksandra Rakovich John F Donegan Jonathan N Coleman

We have developed an in situ method to estimate the lateral size of exfoliated nanosheets dispersed in a liquid. Using standard liquid exfoliation and size-selection techniques, we prepared a range of dispersions of graphene, MoS2 and WS2 nanosheets with different mean lateral sizes. The mean nanosheet length was measured using transmission electron microscopy (TEM) to vary from ∼40 nm to ∼1 μm...

2003
Martin R. West Ludger Wößmann John F. Kennedy

We examine whether the sorting of differently achieving students into differently sized classes results in a regressive or compensatory pattern of class sizes for a sample of national school systems. Sorting effects are identified by subtracting the causal effect of class size on performance from their total correlation. Our empirical results indicate substantial compensatory sorting within and...

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