a quantum chemical investigation was carried out to study the properties of intermolecular f•••f, br•••br and br•••o interactions in crystalline 1-bromo-2,3,5,6-tetrafluoro-nitrobenzene (bfnb). this system was selected to mimic the halogen-halogen as well as halogen bonding interactions found within crystal structures as well as within biological systems. we found that fluorine atoms have weak ...

As a two-dimensional semiconductor, WS₂ has attracted great attention due to its rich physical properties and potential applications. However, it is still difficult to synthesize monolayer single-crystalline WS₂ at larger scale. Here, we report the growth of large-scale triangular single-crystalline WS₂ with a semi-sealed installation by chemical vapor deposition (CVD). Through this method, tri...

Molecular dynamics simulations of a model main-chain liquid-crystalline polymer (LCP), and a low molecular weight analogue, have been carried out using an efficient parallel algorithm. Amain-chain LCP is formed with the help of Gay-Berne mesogenic units connected to each other through flexible methylene spacers. We have studied the effect of varying the spacer length, and have examined the regi...

The effects of constrained sample dimensions on the mechanical behavior of crystalline materials have been extensively investigated. However, there is no clear understanding of these effects in nano-sized amorphous samples. Herein, nanoindentation together with finite element simulations are used to compare the properties of crystalline and glassy CoNi(Re)P electrodeposited nanowires (ϕ ≈ 100 n...

Photoemission spectroscopy is used to probe the electronic properties, reactivity and energy level alignment at interfaces of tris{2,5-bis(3,5-bis-trifluoromethyl-phenyl)-thieno}[3,4-b,h,n]-1,4,5,8,9,12-hexaazatriphenylene (THAP) deposited on both medium and high work function metallic substrates. Crystalline and non-crystalline metal substrates are used in order to investigate the effect of bo...

Lactose is available in several crystalline forms, which differ in binding properties. A new method of estimating the fragmentation propensity was applied to investigate the consolidation and compaction behaviour of this excipient for direct compression. Mercury porosimetry was used to demonstrate that crystalline lactose fragments during compaction. Tablet strength was found to be dependent on...

Colloidal particles interacting via a long-range repulsion can, in contrast to hard-sphere systems, exhibit crystalline ordering at low volume fraction. Here we experimentally investigate the structure and properties of such "colloidal Wigner crystals." We find a body-centered-cubic crystalline phase at volume fractions of ϕ≳15%, which exhibits large fluctuations of individual particles from th...

Amorphous non-crystalline solid: a solid in which. Is there any method in which to distinguish between crystal. Distinction between crystalline and amorphous solids. The essential differences are displayed in Figure 2. The salient.You may also download a PDF copy of this book 147 MB or just this chapter 9 MB. To know the characteristic properties of crystalline and amorphous solids. Or metallic...

The interband optical properties of crystalline quartz and amorphous SiO2 in the vacuum ultraviolet VUV region have been investigated using combined spectroscopic ellipsometry and VUV spectroscopy. Over the range of 1.5–42 eV the optical properties exhibit similar exciton and interband transitions, with crystalline SiO2 exhibiting larger transition strengths and index of refraction. Crystalline...

In our previous report, we demonstrated the growth of high-quality epitaxial Co-doped (Ba-122) thin films using single crystalline (STO) templates on (LSAT) substrates with pulsed laser deposition (PLD). Here, we report the dependence of the structural and superconducting properties of Ba-122 thin films on STO templates that were 2-150 unit cell (u.c.) thick. We obtained genuine epitaxial thin ...