In situ Brewster angle microscopy and surface pressure studies on the interfacial growth of mesostructured silica thin films

2000 ◽  
pp. 773-774 ◽  
Author(s):  
Karen J. Edler ◽  
Steve J. Roser ◽  
Stephen Mann
Keyword(s):  
Thin Films ◽  
Surface Pressure ◽  
Brewster Angle ◽  
Brewster Angle Microscopy ◽  
Mesostructured Silica ◽  
Silica Thin Films ◽  
Interfacial Growth

Formation and characterization of high-density silver nanoparticles embedded in silica thin films by “in situ” self-reduction

2001 ◽  
Vol 16 (10) ◽  
pp. 2934-2938 ◽  
Author(s):  
G. Compagnini ◽  
M. M. Fragal´ ◽  
L. D'Urso ◽  
C. Spinella ◽  
O. Puglisi
Keyword(s):  
Thin Films ◽  
Silver Nanoparticles ◽  
High Density ◽  
Silver Particles ◽  
X Ray Diffraction ◽  
Optical Extinction ◽  
Organometallic Precursor ◽  
Silica Thin Films ◽  
20 Nm

Silver nanoparticles (10–20 nm) embedded into silica thin films have been obtained through the use of a silver organometallic precursor compound dissolved in Spin-On-Glass and subsequently spinned onto suitable substrates. In this paper we present a study of the shape, size, and distribution of silver particles through the use of microscopes, x-ray diffraction, and optical extinction. It has been observed that the obtained films are stable for annealing up to 500 °C with a progressive degradation above this temperature. Furthermore it is possible to obtain high-density silver particles up to 15% in weight without affecting the cluster size and shape.

Enhanced Luminescence Characteristics of Mesophase Silica Thin Films Doped with In-Situ-Formed Rare Earth Complexes

2016 ◽  
Vol 8 (1) ◽  
pp. 122-127 ◽  
Author(s):  
Sang Hoon Choi ◽  
Seok-Jun Seo ◽  
Dan Zhao ◽  
Kyoung-Tae Park ◽  
Bum Sung Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Rare Earth ◽  
Rare Earth Complexes ◽  
Silica Thin Films ◽  
Enhanced Luminescence ◽  
Luminescence Characteristics

ISOTHERMS AND MORPHOLOGY OF NANOCOMPOSITE THIN FILMS DEPOSITED USING MODIFIED LANGMUIR-SCHAEFER TECHNIQUE

2016 ◽  
Vol 78 (5-10) ◽  
Author(s):  
S. Malik ◽  
Fatin Hana Naning ◽  
Azyuni Aziz
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Stearic Acid ◽  
Surface Pressure ◽  
Polymer Nanocomposite ◽  
Cdse Nanoparticles ◽  
Large Area ◽  
Nanocomposite Thin Films ◽  
Exposure Technique

Various techniques have been used to prepare polymer nanocomposite thin films that involve tedious work and consume considerable amount of materials and time. In this study, nanocomposite thin films of poly (3-hexylthiophene -2, 5-diyl) (P3HT), stearic acid and CdSe nanoparticles were fabricated by a stamping method which is a modification of Langmuir Schaefer technique. The CdSe nanoparticles were then grown in-situ between subsequent layers of thin film by gas exposure technique. Their surface-pressure (-A) isotherms and morphology were investigated. The surface-pressure isotherms revealed that, impurities in water subphase affect the profile of Langmuir monolayer. Stearic acid was found to be more dominant as compared to P3HT. The modified Langmuir Schaefer technique produced fairly smooth, large area nanocomposite thin films as shown by the AFM images. A prominent advantage of this procedure is that it requires only small amount of materials.

Direct Observation of Calcium Oxalate Monohydrate Precipitation at Phospholipid Monolayers with Brewster Angle Microscopy

2003 ◽  
Vol 774 ◽  
Author(s):  
Isa O. Benítez ◽  
Rénal Backov ◽  
Saeed R. Khan ◽  
Daniel R. Talham
Keyword(s):  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Brewster Angle ◽  
Brewster Angle Microscopy ◽  
Phase Boundaries ◽  
Phospholipid Monolayers ◽  
Bright Spots ◽  
Two Phases ◽  
Scanning Electron

AbstractThe precipitation of calcium oxalate monohydrate (COM) at phospholipid monolayers has been observed in-situ by Brewster angle microscopy (BAM). A monolayer of 1,2-dipalmitoylsn-glycero-3-phosphocholine (DPPC) compressed to a LC state over a calcium oxalate subphase shows the growth of COM as very bright spots. The identity of COM was confirmed in a transferred film by scanning electron microscopy. BAM can also be used to determine where COM precipitates when the monolayer has two phases at equilibrium. Monolayers of DPPC and 1,2-dipalmitoyl-sn-glycero-3-[phospho-rac-(1-glycerol)] (DPPG) crystallize COM at phase boundaries. In addition, phase separated binary phospholipid mixtures of DPPC and 1,2-dimiristoyl-sn-glycero-3-phosphocholine (DMPC) have been prepared and monitored by BAM. The crystal growth in this case is confined to domains of DPPC due to its ability to form a liquid condensed phase.

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