Distinction of heterogeneity on Au nanostructured surface based on phase contrast imaging of atomic force microscopy

Jung, Mi; Choi, Jeong‐Woo

doi:10.1016/j.ultramic.2010.02.030

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…Similar quantitative characterization of the phase separation was recently reported in a photoactive layer of polymer solar cell . Generally, phase imaging through tapping mode AFM can be used to distinguish the heterogeneity on the nanostructured surfaces . Here, the interface length at constant area increased through annealing temperature rise (Figure a) and implied enhanced disparities in local environments or intensified heterogeneity.…”

Section: Discussionsupporting

confidence: 74%

“…45 Generally, phase imaging through tapping mode AFM can be used to distinguish the heterogeneity on the nanostructured surfaces. 46 Here, the interface length at constant area increased through annealing temperature rise (Figure 10a) and implied enhanced disparities in local environments or intensified heterogeneity. Therefore, L/A was accepted as the heterogeneity index.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 94%

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Heterogeneity Assisted Damping Enhancement of Low and High Frequency Mechanical Waves in a Soft Polymer Nanocomposite

Khoubi-Arani

Mohammadi

2017

Ind. Eng. Chem. Res.

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Low-amplitude dynamic and morphological heterogeneities of a biphasic copolymeric matrix were amplified by soft nanoparticle loading and thermally induced phase separation (TIPS). The evolution of system concentration fluctuation size (ξ) was quantified as a function of quench depth in its closed-loop like phase diagram. The system characterization was then complemented by extracting its bimodal heterogeneity index as normalized interface length over area (L/A) from phase imaging analysis of atomic force microscopy (AFM). Both criteria were amplified by annealing temperature rise, resulting in damping enhancement under low and high frequency mechanical waves, shown by dynamic mechanical thermal analysis (DMTA) and ultrasound spectroscopy, respectively. At the highest annealing temperature, 160 °C, the morphogenesis led to simultaneous increase of effective damping temperature range (ΔT eff) and maximum tan δ to 190 °C and 2, respectively. Finally, damping efficacy (D eff, i.e., ΔT eff[tan δ]max) and the ultrasound attenuation coefficient (α) were linearly proportional to ξ and L/A, while intercorrelated through a Williams–Landau–Ferry (WLF) type equation.

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Section: Discussionsupporting

confidence: 74%

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 94%

Heterogeneity Assisted Damping Enhancement of Low and High Frequency Mechanical Waves in a Soft Polymer Nanocomposite

Khoubi-Arani

Mohammadi

2017

Ind. Eng. Chem. Res.

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“…Phase imaging has already been widely applied for nanomaterial research, including in surface composition studies of polymers by ion modication, 121,122 in studies on the compositional difference on a heterogeneous nanostructure surface, 123 and in quantitative characterization of phase separation in polymer-blended lms. 124 For example, Jian Zhong et al 125 used AFM to observe the self-assembly process of regenerated silk broin from random coil nanostructures to antiparallel b-sheet nanostructures (Fig.…”

Section: Phase Imagingmentioning

confidence: 99%

Seeing is believing: atomic force microscopy imaging for nanomaterial research

Zhong

Yan

2016

RSC Adv.

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“…Figure 3a shows the topography and Figure 3b shows the phase-contrast map obtained simultaneously in semi-contact mode AFM. In the latter figure, a strong contrast occurs at the crack edges, which is related to changes in composition or strain energy [18,19]. Since migration of In adatoms is well known to be governed by strain energy [17,20], this contrast would also depict the compositional variation near the crack edges.…”

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confidence: 99%

Nanocrack-induced leakage current in AlInN/AlN/GaN

et al. 2012

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Here we report on the study of nano-crack formation in Ali_ x In x N/AlN/GaN heterostructures, on its association with composition fluctuation and on its local electrical properties. It is shown here that indium segregation at nano-cracks and threading dislocations originating from the non-pseudomorphic AIN interlayer could be the cause of the high reverse-bias gate leakage current of Ni/Au Schottky contacts on Ali_ x In x N/AlN/GaN heterostructures and significantly affects the contact rectifying behavior. Segregation of indium around crack tips in Ali_ x In x N acting as conductive paths was assessed with conductive atomic force microscopy.

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Distinction of heterogeneity on Au nanostructured surface based on phase contrast imaging of atomic force microscopy

Cited by 9 publications

References 23 publications

Heterogeneity Assisted Damping Enhancement of Low and High Frequency Mechanical Waves in a Soft Polymer Nanocomposite

Heterogeneity Assisted Damping Enhancement of Low and High Frequency Mechanical Waves in a Soft Polymer Nanocomposite

Seeing is believing: atomic force microscopy imaging for nanomaterial research

Nanocrack-induced leakage current in AlInN/AlN/GaN

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