Precise quantification of nanoparticle surface free energy via colloidal probe atomic force microscopy

Ganjeh‐Anzabi, Pejman; Jahandideh, Heidi; Kedzior, Stephanie A.; Trifkovic, Milana

doi:10.1016/j.jcis.2023.03.061

Cited by 3 publications

(2 citation statements)

References 63 publications

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“…Among them, Johnson, Kendall, and Roberts (1971) proposed the famous JKR theory to study the adhesive collision contact process of particles on the surface [20]. The magnitude of adhesion force, when the particles are in contact with the insulator surface, is determined according to different contact mechanics models, and the collision adhesion process between the particles and the surface under the action of adhesion force is investigated [21,22].…”

Section: Collision Contact Theorymentioning

confidence: 99%

h={\left(\frac{44.3{\omega }^{2}{R}_{1}}{{K}^{2}}\right)}^{1/3}

where K = 4/3( k 1 + k 2 ), k i =(1 –

{v}_{i}^{2}

)/ E i , i = 1 or 2; v 1 , v 2, and E 1 , E 2 are the Poisson coefficient and Young’s modulus of particles and insulators surface, respectively; R 2 is the insulator surface radius; ω is the adhesion work, ω = 2

\sqrt{{\gamma }_{1}{\gamma }_{2}}

, γ 1 and γ 2 are the surface energy of the particle and insulator, respectively.…”

Section: Analysis Of Contamination Accumulation Processmentioning

confidence: 99%

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Modelling and simulation study on dynamic pollution accumulation process of composite insulator

Yang,

Liu,

Zeng

et al. 2024

High Voltage

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With the widespread application of composite insulators in transmission lines, exploring the accumulation mechanism of pollution particles on composite insulator surfaces is of importance to ensure the safe and steady operation of the power system. Addressing the current theoretical shortcomings, this study categorises the accumulation process of particles on the insulator surface into three stages, namely ‘spatial motion’, ‘surface collision’, and ‘surface motion’. The motion and rotation velocities in a multi‐physics field are calculated in the spatial motion stage. In the surface collision stage, a parameter called ‘neck height’ is introduced to determine the optimum mechanics theory, and the normal deposition criterion is established. For the surface motion stage, the sliding displacement and rolling displacement on the surface are calculated based on the rotation speed of the particles. A dynamic pollution accumulation model of the composite insulator is established based on the normal deposition criterion and tangential displacement. Finally, numerical simulations are performed by using the finite element method. Simulation results show that the proposed model agrees with the actual insulator pollution accumulation, and the deposition model is still applicable for various types of composite insulators operating in different applied voltages. The deposition probability of particles increases with the increasing particle size. In the surface motion stage, particle displacement increases with particle size and wind velocity.

show abstract

Section: Collision Contact Theorymentioning

confidence: 99%

h={\left(\frac{44.3{\omega }^{2}{R}_{1}}{{K}^{2}}\right)}^{1/3}

where K = 4/3( k 1 + k 2 ), k i =(1 –

{v}_{i}^{2}

\sqrt{{\gamma }_{1}{\gamma }_{2}}

, γ 1 and γ 2 are the surface energy of the particle and insulator, respectively.…”

Section: Analysis Of Contamination Accumulation Processmentioning

confidence: 99%

Modelling and simulation study on dynamic pollution accumulation process of composite insulator

Yang,

Liu,

Zeng

et al. 2024

High Voltage

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Advanced Characterization Techniques of Nanoparticles for Textile Finishing

Banerjee,

Mondal,

Banerjee

et al. 2024

Materials Horizons: From Nature to Nanomaterials

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Pore-scale physics of ice melting within unconsolidated porous media revealed by non-destructive magnetic resonance characterization

Haile,

Sajjad,

Zhang

et al. 2024

Sci Rep

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Melting of ice in porous media widely exists in energy and environment applications as well as extraterrestrial water resource utilization. In order to characterize the ice-water phase transition within complicated opaque porous media, we employ the nuclear magnetic resonance (NMR) and imaging (MRI) approaches. Transient distributions of transverse relaxation time T2 from NMR enable us to reveal the substantial role of inherent throat and pore confinements in ice melting among porous media. More importantly, the increase in minimum T2 provides new findings on how the confinement between ice crystal and particle surface evolves inside the pore. For porous media with negligible gravity effect, both the changes in NMR-determined melting rate and our theoretical analysis of melting front confirm that conduction is the dominant heat transfer mode. The evolution of mushy melting front and 3D spatial distribution of water content are directly visualized by a stack of temporal cross-section images from MRI, in consistency with the corresponding NMR results. For heterogeneous porous media like lunar regolith simulant, the T2 distribution shows two distinct pore size distributions with different pore-scale melting dynamics, and its maximum T2 keeps increasing till the end of melting process instead of reaching steady in homogeneous porous media.

show abstract

Precise quantification of nanoparticle surface free energy via colloidal probe atomic force microscopy

Cited by 3 publications

References 63 publications

Modelling and simulation study on dynamic pollution accumulation process of composite insulator

Modelling and simulation study on dynamic pollution accumulation process of composite insulator

Advanced Characterization Techniques of Nanoparticles for Textile Finishing

Pore-scale physics of ice melting within unconsolidated porous media revealed by non-destructive magnetic resonance characterization

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