Characterisation of ultra-thin polymer films by polarisation modulation FTIR spectroscopy

Steiner, Gerald; Möller, Hella; Savchuk, Olesya; Ferse, Dirk; Adler, Hans‐Juergen P.; Salzer, Reiner

doi:10.1016/s0022-2860(01)00438-0

Cited by 11 publications

(10 citation statements)

References 32 publications

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“…For the methylene stretching vibrations, νas(CH 2 ) and νs(CH 2 ), the transition dipole moments lie perpendicular to the alkyl chain axis for a fully extended, alltrans alkyl chain. OTS shows a strong and broad Si-O-Si stretching band between 1,130 and 1,040 cm −1 , which is in good agreement with other studies [16].…”

Section: November 2009supporting

confidence: 92%

Characterization of octadecyltrichlorosilane self-assembled monolayers on silicon (100) surface

Jung

Choi

2009

Korean J. Chem. Eng.

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Both monolayers and multilayers were obtained from a dilute solution of n-octadecyltrichlorosilane [OTS, CH 3 (CH 2 ) 17 SiCl 3 ] on a SiO 2 /Si surface after a low pressure O 2 plasma treatment. A close-packed monolayer of good quality was formed on the SiO 2 /Si surface. The resulting self-assembled layers were characterized by goniometry, atomic force microscopy (AFM), ellipsometry and Fourier transformed infrared attenuated total reflection (FTIR-ATR) spectroscopy. An examination of the time-dependent water contact angle measurements as a function of the OTS concentration revealed rapid monolayer formation at the initial stage. The contact angle measurements showed that the surface structure of the OTS monolayer was quite resistant to environmental changes as a result of the polymerization of OTS molecules and the formation of covalent bonds between the monolayer and substrate surface. The surface was covered with islands (observed by AFM) that were in-filled to produce in a smooth surface. The FRIR-ATR spectra showed symmetric (νs(CH 2 )) and asymmetric (νas(CH 2 )) components perpendicular to the surface.

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Section: November 2009supporting

confidence: 92%

Characterization of octadecyltrichlorosilane self-assembled monolayers on silicon (100) surface

Jung

Choi

2009

Korean J. Chem. Eng.

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“…In addition, a sharp peak at 1467 cm –1 was also observed, which was attributed to the deformation vibration of −CH 2 – groups. The FTIR absorptions from 1010 to 1110 cm –1 and from 850 to 940 cm –1 are attributed to the stretching vibration of −Si–O–Si– groups, which are evidence of the formation of cross-linked silicone shells …”

Section: Results and Discussionmentioning

confidence: 99%

“…The FTIR absorptions from 1010 to 1110 cm −1 and from 850 to 940 cm −1 are attributed to the stretching vibration of −Si− O−Si− groups, which are evidence of the formation of crosslinked silicone shells. 40 For microcapsules intended to be used in ink applications, the size range needs to be well controlled. 41 Thermochromic pigments, including encapsulated leuco dye systems and liquid crystals, are approximately micron-sized.…”

Section: Resultsmentioning

confidence: 99%

Reversible Nontoxic Thermochromic Microcapsules

Liu

Mazo

Gurr

et al. 2020

ACS Appl. Mater. Interfaces

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Colour changing food spoilage sensors for protein-based food products, such as fish and beef, are mostly based on the halochromic behaviour of pH indicators. However, due to their reversible halochromic nature, these sensors can be manipulated by chemical treatment hiding the true history and quality of deteriorated meat. Therefore, there is a need to create an irreversible and reliable food spoilage sensor, which clearly indicates to consumers if any food degradation or improper storage has occurred, and avoid nefarious food processing companies from disguising spoiled meat as fresh meat. Here, a simple irreversible and halochromic sensor showing spoilage of seafood and meat products is developed. Specifically, chlorophenol red (CPR)-fatty acid particles are dispersed within an ammonia-permeable polymer matrix to form a nontoxic film sensor that shows obvious halochromic behaviour towards bioamine or total volatile basic nitrogen (TVB-N) given off by deteriorated seafood or meat products. After removal of TVB-N, this sensor does not revert back to its original colour, due to a loss of pi-pi stacking of the original sulfonephthalein molecules. These features make this sensor applicable as a novel and reliable spoilage sensor for protein-based food products.

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“…To reduce the Si−O stretching background from glass, gold slides coated with a monolayer of 11-mercaptoundecanol (MUD) were used as model systems for the surface hydroxyl groups on glass slides . A comparison of cured and uncured slides (120 °C, 1 h) showed that the curing process resulted in a significant shift in the Si−O stretching frequency from 1057 cm −1 to 1145 cm −1 (Figure ), corresponding to the disappearance of Si−O−C bonds and the appearance of Si−O−Si bonds . The formation of Si−O−Si bonds is consistent with a chemical reaction leading to attachment of ligand 9 onto the surface with loss of ethanol.…”

mentioning

confidence: 68%

Toward the Single-Molecule Investigation of Organometallic Reaction Mechanisms: Single-Molecule Imaging of Fluorophore-Tagged Palladium(II) Complexes

et al. 2008

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The single-molecule fluorescence microscopy imaging of indiVidual palladium(II) complexes is reported and the requisite high-quantum-yield BODIPY fluorophore tags are synthesized and shown to act as spectators when bound to metal complexes. These combined experimental results lay the fundamental groundwork for studying organometallic reaction chemistry at the single-molecule leVel using fluorophore tags.

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Characterisation of ultra-thin polymer films by polarisation modulation FTIR spectroscopy

Cited by 11 publications

References 32 publications

Characterization of octadecyltrichlorosilane self-assembled monolayers on silicon (100) surface

Characterization of octadecyltrichlorosilane self-assembled monolayers on silicon (100) surface

Reversible Nontoxic Thermochromic Microcapsules

Toward the Single-Molecule Investigation of Organometallic Reaction Mechanisms: Single-Molecule Imaging of Fluorophore-Tagged Palladium(II) Complexes

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