Maximum withdrawal speed for Langmuir–Blodgett film deposition of arachidic acid

Chen, Chun-Wei; Liu, Ta‐Jo

doi:10.1016/j.jcis.2005.12.024

Cited by 12 publications

(18 citation statements)

References 24 publications

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“…The additional transitions in the isotherm of Cu-Pc-C 8 /AA monolayer may be due to the presence of arachidic acid. 18 The extrapolated area per molecule at 20 mN/m is 275 and 380 Å 2 for pure Cu-Pc-C 8 and Cu-Pc-C 8 /AA, respectively. These values are analogous to the typical molecular area of phthalocyanines bearing long side chains.…”

Section: Resultsmentioning

confidence: 98%

“…For the deposition of LB films, contact angles and contact lines have been recognized to play an important role. 18,21 The role of contact angles in LB film deposition has been discussed. 22,23 Even though the specific contact angle values are slightly different, the general conclusion is that LB film deposition is possible if the dynamic contact angle is greater than 90 o during the down-stroke deposition or smaller than 90 o during the up-stroke deposition.…”

Section: Resultsmentioning

confidence: 99%

“…It has also been reported that the divalent cations dramatically improve film stability during deposition because they interact with arachidic acid to form a "di-soap", which enhances the film stability. 18,25,26 Liu et al studied the effects of the addition of cations in AA LB films. 18 It is reported that the addition of Cd 2+ or Ba 2+ improves the AA LB film quality.…”

Section: Resultsmentioning

confidence: 99%

“…16,17 Liu et al reported that the most critical factors determining the stability and quality of LB films formed using arachidic acid as a transfer promoter are the pH value of the subphase and the presence of divalent cations such as Cd 2+ and Ba 2+ . 18 The results show that the divalent cations interact with dissociated carboxylic groups of arachidic acids to form a "disoap", which apparently enhances the LB film stability. Therefore, when arachidic acid is used as a transfer promoter in LB film preparation, divalent cations are always added in the subphase.…”

Section: Introductionmentioning

confidence: 93%

“…Therefore, when arachidic acid is used as a transfer promoter in LB film preparation, divalent cations are always added in the subphase. 18,19 In this work, we have fabricated tetra(5-n-nonyl-8-tertbutyl-2,3-pyrazino[2,3-b]indolo)porphyrazinato copper(II) (referred to as Cu-Pc-C 8 ) films using the Langmuir-Blodgett technique. Note that the thermal evaporation and spin-coating techniques could not be used to fabricate Cu-Pc-C 8 thin films because the molecule decomposes during thermal evaporation and crystallizes during spin-coating.…”

Section: Introductionmentioning

confidence: 99%

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Tetrapyrazinoindoloporphyrazine Langmuir-Blodgett films

2008

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We fabricated tetra(5-n-nonyl-8-tert-butyl-2,3-pyrazino[2,3-b]indolo)porphyrazinato copper(II) (Cu-Pc-C 8 ) Langmuir-Blodgett (LB) films. We further investigated the influence of arachidic acid (AA) as a transfer promoter, as well as the effect of dipping speed, on the deposition of the films on hydrophilic and hydrophobic substrates. In the case of pure Cu-Pc-C 8 LB deposition on a hydrophilic substrate, the transfer ratio was close to one for up-stroke depositions, but the previously deposited film was peeled off and re-spread onto water at down-stroke depositions. Whereas the stability of the Cu-Pc-C 8 LB films was not improved by AA addition on hydrophilic substrates, the deposition of Cu-Pc-C 8 was significantly improved by the presence of AA on a hydrophobic substrate. The AAassisted deposition had transfer ratio of close to 1 and was essentially stable up to 10-layer depositions. Comparison of the UV-visible spectrum of a Cu-Pc-C 8 /AA LB film with that of Cu-Pc-C 8 /AA solution in dichloroethane revealed that the Soret and Q bands for the Cu-Pc-C 8 /AA LB film were broadened and red-shifted due to the aggregation of phthalocyanines upon assembly in the LB film.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Tetrapyrazinoindoloporphyrazine Langmuir-Blodgett films

2008

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Reversible in situ Control over Monolayer Organization

Mukherjee,

Blanchard

2024

ChemPhysChem

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Cr2+ and Cr3+ ions are shown to mediate the formation, morphology, and organization of arachidic acid (AA) Langmuir‐Blodgett (LB) monolayers. This finding, based on cyclic voltammetry (CV), linear sweep voltammetry (LSV) and fluorescence recovery after photobleaching (FRAP) measurements, show that Langmuir monolayer formation depends on subphase pH and metal ion concentration. Following monolayer deposition on ITO, the LB monolayer organization can be modified reversibly through control of the Cr oxidation state, which has not been shown before by other monolayers formed with other divalent metal ions. The dynamics and the mobility of a chromophore (perylene) incorporated into the monolayer sense changes in Cr oxidation state‐dependent organization of the LB monolayer. Demonstrating reversible changes in monolayer organization provides an opportunity to control chemical and electron access to the interface support.

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N-terminal acetylation does not alter α-synuclein's interfacial properties

Mohapatra

Chaudhary

2021

International Journal of Biological Macromolecules

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Maximum withdrawal speed for Langmuir–Blodgett film deposition of arachidic acid

Cited by 12 publications

References 24 publications

Tetrapyrazinoindoloporphyrazine Langmuir-Blodgett films

Tetrapyrazinoindoloporphyrazine Langmuir-Blodgett films

Reversible in situ Control over Monolayer Organization

N-terminal acetylation does not alter α-synuclein's interfacial properties

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