Contact angle and free surface energy of CdS films on polystyrene substrate

Kolodin, A. N.; Булавченко, А. И.

doi:10.1016/j.apsusc.2018.08.176

Cited by 21 publications

(5 citation statements)

References 38 publications

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“…The relevant calculations were performed using the Owens-Wendt equation. [33,34] The surface properties of the supporting substrates significantly affect the polymorphs and crystalline structures of the film growth process. [10,14,[28][29][30] Thus, we first confirmed the surface morphological structures through AFM analysis of 40-nm-thick CuPc films on the substrates with different inert molecular configurations on the surfaces, i.e., the comparative bare case and the ODTS and HMDS cases shown in Figures 2a-c, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The surface energies (γ s s) of the supporting substrates and the DNTT or p ‐6P layers were determined by measuring the contact angles (θ) of water and diiodomethane as two probe liquids, by using a contact‐angle analyzer (Phoenix 300A, SEO Co., Inc.). The γ s values were calculated by fitting the Owens–Wendt equation: [ 33,34 ]

\begin{matrix} (1 + \cos θ) γ_{l v} = 2 \sqrt{γ_{normals}^{d} γ_{l v}^{d}} + 2 \sqrt{γ_{normals}^{p} γ_{l v}^{p}} \end{matrix}

where γ s and γ lv represent the surface energies of the target surface and the probe liquid, respectively, and the superscripts d and p refer to the dispersive and polar (nondispersive) terms, respectively. The surface morphologies of the p ‐6P and CuPc films were measured via atomic force microscopy (AFM, Digital Instruments Multimode) over a 5 × 5 µm 2 scan area.…”

Section: Methodsmentioning

confidence: 99%

“…Characterization: The surface energies (γ s s) of the supporting substrates and the DNTT or p-6P layers were determined by measuring the contact angles (θ) of water and diiodomethane as two probe liquids, by using a contact-angle analyzer (Phoenix 300A, SEO Co., Inc.). The γ s values were calculated by fitting the Owens-Wendt equation: [33,34]…”

Section: Methodsmentioning

confidence: 99%

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Tuning Organic Semiconducting Binary Heterostructures Inherited by Template Nanostructures for Achieving High‐Performance Organic Transistors

Choi

Seo

et al. 2021

Adv Elect Materials

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The charge transport in organic semiconductors is unavoidably affected by morphological or crystalline structure resulting from the self‐organized polycrystalline characteristics. To obtain the desired molecular arrangement in the heterostructured active layer, where nanostructures are gradually formed by piecing individual parts together into the final structures, it is necessary to formulate a precise strategy for anisotropic formation via weak epitaxy growth (WEG) of the layer structures. This strategy includes the nanostructural control of the bottom‐templating layer through the inert character optimization of the supporting substrate surfaces. For these purposes, a copper phthalocyanine (CuPc) film grown on p‐sexiphenyl (p‐6P) as a bottom‐templating layer is prepared to induce WEG between them, and supporting substrates are controlled using various inert self‐assembled interlayers. The grain structures of the bottom‐templating p‐6P layer are dependent on the polar term of the surface energy in the variously modified supporting substrate, thereby inducing the activated WEG effect between the p‐6P and CuPc semicrystalline structures. This strategy significantly improved the device performances of CuPc transistors (by a factor of up to 14). This result has important implications for optimizing a heterostructured active layer induced by the WEG mechanism and provides a solution for improving the device performance of organic electronics.

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Section: Resultsmentioning

confidence: 99%

\begin{matrix} (1 + \cos θ) γ_{l v} = 2 \sqrt{γ_{normals}^{d} γ_{l v}^{d}} + 2 \sqrt{γ_{normals}^{p} γ_{l v}^{p}} \end{matrix}

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Tuning Organic Semiconducting Binary Heterostructures Inherited by Template Nanostructures for Achieving High‐Performance Organic Transistors

Choi

Seo

et al. 2021

Adv Elect Materials

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show abstract

“…However, a single CdS material is often insufficient for practical photocatalytic applications. This is due to the lack of wettability [12], dye adsorption properties and aggregation of CdS nanomaterials [13], which will lead to a decrease of photoactivity [14,15].…”

Section: Introductionmentioning

confidence: 99%

High-Performance α-Bi<sub>2</sub>O<sub>3</sub>/CdS Heterojunction Photocatalyst: Innovative Design, Electrochemical Performance and DFT Calculation

Lin

Shan

Guo

et al. 2022

JNanoR

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Heterojunction semiconductor photocatalysis is an auspicious technique for clear up organic pollutants from water, and have been of valuable strategy in the area of photocatalysis. Herein, electrophoretic deposition procedure was used to prepare α-Bi2O3/CdS type-Ⅱ heterojunction photocatalysts. The results of PL, Raman, and EIS show that there is a heterojunction effect in α-Bi2O3/CdS, which is propitious to improve the separation efficiency of photogenerated electron-hole pairs. The DFT calculation reveals that the work function of CdS (4.57 eV) is higher than that of α-Bi2O3 (3.37 eV), which facilitates the migrating of e- from the CB of α-Bi2O3 to the CB of CdS, and the migrating of h+ from the VB of CdS to the VB of α-Bi2O3, thus the e--h+ pairs with high redox ability are retained. The performances were assessed by degrading methyl orange (MO), acid magenta under simulated visible light irradiation. Under simulated visible light irradiation, BC45 composite exhibited the highest degradation efficiency of 87% (MO) and 81% (acid fuchsin) for 4 h, which was about 2 times higher than that of CdS (MO) and (acid fuchsin). It is believed that the dual characteristics of H2O wettability and dye adsorption performance in α-Bi2O3/CdS composites promote photocatalytic process compared with single CdS and α-Bi2O3. The study could provide new insights to develop efficiently capable photocatalysts of the α-Bi2O3/CdS composites.

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“…According to the calculations, it was observed that the presence of Ag interlayer between the TCO layers had an important effect on the SFE properties of the sandwich films. In addition, the work of adhesion (W a ) values between TCOs and Ag interlayer were estimated using the calculated SFE values of each interlayer based on the Dupré, Fowkes and Girifalco-Good equations [50][51][52][53][54][55]. The results obtained by using surface thermodynamics approaches were also supported with various characterization methods such as XRD, AFM, and SEM.…”

Section: Introductionmentioning

confidence: 99%

Surface free energy and wettability properties of transparent conducting oxide-based films with Ag interlayer

Özbay

Erdogan²,

Erden

et al. 2021

Applied Surface Science

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Contact angle and free surface energy of CdS films on polystyrene substrate

Cited by 21 publications

References 38 publications

Tuning Organic Semiconducting Binary Heterostructures Inherited by Template Nanostructures for Achieving High‐Performance Organic Transistors

Tuning Organic Semiconducting Binary Heterostructures Inherited by Template Nanostructures for Achieving High‐Performance Organic Transistors

High-Performance α-Bi<sub>2</sub>O<sub>3</sub>/CdS Heterojunction Photocatalyst: Innovative Design, Electrochemical Performance and DFT Calculation

Surface free energy and wettability properties of transparent conducting oxide-based films with Ag interlayer

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