Ordering effects in thin smectic-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">C</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">*</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>films: An x-ray-reflectivity study

Olbrich, E.; Marinov, Ofir; Davidov, D.

doi:10.1103/physreve.48.2713

Cited by 28 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, we calculated the densities of organic thin films according to Xiang et al’s method and X-ray reflectometry (XRR) analysis. − The X-ray reflectometry (XRR) analysis has been used to investigate the properties of thin polymer films over recent decades. , XRR enables the determination of film density, thickness, and surface roughness. However, the study about the application of the X-ray reflectivity technique in analyzing the density measurement of small molecular thin films is relatively scarce .…”

Section: Resultsmentioning

confidence: 99%

A Comparison Study of the Organic Small Molecular Thin Films Prepared by Solution Process and Vacuum Deposition: Roughness, Hydrophilicity, Absorption, Photoluminescence, Density, Mobility, and Electroluminescence

et al. 2011

View full text Add to dashboard Cite

In this work, we report a systematic study of the properties of the solution-processed organic small molecular thin films in order to get an in-depth understanding of the distinctive nature of solution-processed thin films. N,N′-Di(3-methylphenyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4-diamine (TPD), a typical hole-transporting compound, was chosen to fabricate films by both solution process and vacuum deposition. The comparison study between the two kinds of TPD films shows that the surface of the solution-processed TPD films is more smooth and hydrophilic than that of the vacuum-deposited film. In addition, the density of the TPD films was measured by two different methods, and an increase in density was observed in solution-processed films in comparison with the vacuum-deposited film. The space-charge-limited current (SCLC) measurements indicate an increased hole transport mobility of the solution-processed TPD films over that of the vacuum-deposited film, which may result from the more compact intermolecular stacking in solution-processed TPD films. Finally, the light-emitting diodes with a solution-processed TPD layer as the hole-transport layer were fabricated and showed significantly enhanced injected current density and higher luminance relative to the device using the vacuum-deposited TPD film.

show abstract

Section: Resultsmentioning

confidence: 99%

A Comparison Study of the Organic Small Molecular Thin Films Prepared by Solution Process and Vacuum Deposition: Roughness, Hydrophilicity, Absorption, Photoluminescence, Density, Mobility, and Electroluminescence

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The broadening of peak is due to hydrophilic-hydrophobic interaction of dodecyl chains. [37,38] 3.4 AFM imaging of LB films AFM imaging of LB films of (organic + nano) materials is usually done in non-contact mode. Because films of soft materials can get damaged during contact or intermittent mode.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Effects of silver nanoparticles doping on morphology and luminescence behaviour of ferroelectric liquid crystals Langmuir–Blodgett films

2016

View full text Add to dashboard Cite

We report the deposition of Langmuir-Blodgett (LB) thin films of low-weight dispersed composite systems of ferroelectric liquid crystals (FLCs)-functionalised silver (Ag) nanoparticles. Because of their amphiphilic nature the molecules form stable Langmuir monolayers, which were transferred to silicon substrates. We noticed that absorption wave numbers are present for each bond constituting FLC-nanoparticles composite system, ensuring a complete transfer of molecules from water sub-phase. XRD showed intense peaks at 2θ = 3.2°due to the layer structure of FLC molecules. We infer from the morphology of LB films that doping of nanoparticles do not provide any hindrance to SmC Ã layer structure of FLC molecules. The photoluminescence study indicates blue shift in emission spectra and peak intensity increases with Ag nanoparticles concentration. ARTICLE HISTORY

show abstract

“…It is, however, not clear whether the droplets are superimposed on the bare substrate or on a specific tiny interfacial film [22][23][24]. The appearance of droplets is presumably related to the large cohesive energy of the material due to strong interactions of the molecular dipoles in successive layers.…”

Section: Introductionmentioning

confidence: 99%

Structure and polarity of 8CB films evaporated onto solid substrates

et al. 2003

View full text Add to dashboard Cite

Brewster-angle reflection ellipsometry and surface optical second harmonic generation were used to study the growth of 4'-n-octyl-4-cyanobiphenyl (8CB) films evaporated in air onto polymeric and quartz glass substrates. The layer-by-layer growth of the films terminates after formation of two distinctive interfacial layers. Both of these two layers are polar and tilted. In the first layer the molecules lie nearly flat on the surface, while in the second layer they point on average about 50 degrees toward the surface normal. The dipole moment of the second layer has a lower magnitude and an opposite direction with respect to the dipole moment of the first layer.

show abstract

Ordering effects in thin smectic-C*films: An x-ray-reflectivity study

Cited by 28 publications

References 25 publications

A Comparison Study of the Organic Small Molecular Thin Films Prepared by Solution Process and Vacuum Deposition: Roughness, Hydrophilicity, Absorption, Photoluminescence, Density, Mobility, and Electroluminescence

A Comparison Study of the Organic Small Molecular Thin Films Prepared by Solution Process and Vacuum Deposition: Roughness, Hydrophilicity, Absorption, Photoluminescence, Density, Mobility, and Electroluminescence

Effects of silver nanoparticles doping on morphology and luminescence behaviour of ferroelectric liquid crystals Langmuir–Blodgett films

Structure and polarity of 8CB films evaporated onto solid substrates

Contact Info

Product

Resources

About