Nanomaterials in microchip electrophoresis – A review

Jozanović, Marija; Pukleš, Iva; Sakač, Nikola; Carrilho, Emanuel; Kilár, Anikó; Matasović, Brunislav; Samardžić, Mirela; Budetić, Mateja; Kilár, Ferenc

doi:10.1016/j.trac.2023.117111

Cited by 8 publications

(5 citation statements)

References 130 publications

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“…The underlying principles in this wettability modification include the interaction between the specific properties introduced by the nanocomponents and the PDMS surface. The presence of these factors in the stability and durability of wettability changes caused by nanomaterials is attested to in the scientific literature [ 30 , 44 , 45 , 46 ].…”

Section: Incorporation Of Nanomaterialsmentioning

confidence: 99%

“…Examples of the use of superhydrophobic surfaces include self-cleaning paint and acrylics that prevent the adhesion of dirt, improving the surface’s capacity to be cleaned by rain. These coatings can also be applied to avoid snow accumulation on tall structures such as antennas; in toilet urinals to repel urine, reducing the need for water; in paints for architectural heritage; in photovoltaic panels to remove dust and increase efficiency; in functional textiles with the use of nanoparticles; and in other diverse applications as anti-icing properties in the aerospace industry and wind blades beyond anti-fouling purpose [ 28 , 29 , 30 , 31 , 32 ]. Superhydrophilic applications include self-cleaning paint and coatings that expedite the cleaning process with a stream of water or rain.…”

Section: Introductionmentioning

confidence: 99%

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A Review of Methods to Modify the PDMS Surface Wettability and Their Applications

Neves,

Afonso,

Nobrega

et al. 2024

Micromachines

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Polydimethylsiloxane (PDMS) has attracted great attention in various fields due to its excellent properties, but its inherent hydrophobicity presents challenges in many applications that require controlled wettability. The purpose of this review is to provide a comprehensive overview of some key strategies for modifying the wettability of PDMS surfaces by providing the main traditional methods for this modification and the results of altering the contact angle and other characteristics associated with this property. Four main technologies are discussed, namely, oxygen plasma treatment, surfactant addition, UV-ozone treatment, and the incorporation of nanomaterials, as these traditional methods are commonly selected due to the greater availability of information, their lower complexity compared to the new techniques, and the lower cost associated with them. Oxygen plasma treatment is a widely used method for improving the hydrophilicity of PDMS surfaces by introducing polar functional groups through oxidation reactions. The addition of surfactants provides a versatile method for altering the wettability of PDMS, where the selection and concentration of the surfactant play an important role in achieving the desired surface properties. UV-ozone treatment is an effective method for increasing the surface energy of PDMS, inducing oxidation, and generating hydrophilic functional groups. Furthermore, the incorporation of nanomaterials into PDMS matrices represents a promising route for modifying wettability, providing adjustable surface properties through controlled dispersion and interfacial interactions. The synergistic effect of nanomaterials, such as nanoparticles and nanotubes, helps to improve wetting behaviour and surface energy. The present review discusses recent advances of each technique and highlights their underlying mechanisms, advantages, and limitations. Additionally, promising trends and future prospects for surface modification of PDMS are discussed, and the importance of tailoring wettability for applications ranging from microfluidics to biomedical devices is highlighted. Traditional methods are often chosen to modify the wettability of the PDMS surface because they have more information available in the literature, are less complex than new techniques, and are also less expensive.

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Section: Incorporation Of Nanomaterialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of Methods to Modify the PDMS Surface Wettability and Their Applications

Neves,

Afonso,

Nobrega

et al. 2024

Micromachines

View full text Add to dashboard Cite

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“…In line with these advancements, analytical techniques have had to adapt to measurements at these scales, as well as to optimally interface or integrate into microfluidic devices. Therefore, various detection techniques have been adapted to address this issue, such as electrochemistry [ 16 , 17 ], capillary electrophoresis [ 18 , 19 ], mass spectrometry [ 20 , 21 , 22 , 23 ], nuclear magnetic resonance [ 24 , 25 ] spectroscopy, and optical detection [ 26 , 27 , 28 , 29 , 30 , 31 ]. Photonic detection offers particular advantages with respect to other techniques.…”

Section: Introductionmentioning

confidence: 99%

On-Chip Photonic Detection Techniques for Non-Invasive In Situ Characterizations at the Microfluidic Scale

Kurdadze,

Lamadie,

Nehme

et al. 2024

Sensors

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Microfluidics has emerged as a robust technology for diverse applications, ranging from bio-medical diagnostics to chemical analysis. Among the different characterization techniques that can be used to analyze samples at the microfluidic scale, the coupling of photonic detection techniques and on-chip configurations is particularly advantageous due to its non-invasive nature, which permits sensitive, real-time, high throughput, and rapid analyses, taking advantage of the microfluidic special environments and reduced sample volumes. Putting a special emphasis on integrated detection schemes, this review article explores the most relevant advances in the on-chip implementation of UV–vis, near-infrared, terahertz, and X-ray-based techniques for different characterizations, ranging from punctual spectroscopic or scattering-based measurements to different types of mapping/imaging. The principles of the techniques and their interest are discussed through their application to different systems.

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“…For instance, Martin et al illustrated that the DC electric field assist contributes to the alignment of the carbon nanotube and enhances the epoxy composite's conductivity [29]. However, unlike the AC electric field assist, the DC electric field assist causes the movement of the filler particles towards the oppositely charged electrodes due to the electrophoresis [30], so it is usually used to separate and concentrate particles (or molecules) from the matrix [31]. Even so, it is worth noting that the DC electric field assist is helpful for the conduction paths, which determines the nonlinear conductivity.…”

Section: Introductionmentioning

confidence: 99%

DC assisted electric field on the improvement of the nonlinear electrical conductivity of SiC/LDPE field grading composites

Han,

Chen,

Yin

et al. 2024

J. Phys. D: Appl. Phys.

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Nonlinear resistive field grading material presents nonlinear electrical conductivity, and self-homogenizes the electric field distribution. The nonlinear conductivity is closely associated to the filler distribution, which can be modulated by the electric field assist during the material preparation. In this paper, the effects of the direct current (DC) electric field assist on the filler distribution and nonlinear conductivity of the nonlinear resistive field grading materials were studied for the first time. The silicon carbide (SiC)/low-density polyethylene (LDPE) composites were prepared under different DC assisted electric field. The composites’ microstructure, dielectric spectra and DC conductivity were characterized, respectively. Results illustrate that the DC electric field assist leads to the gradient distribution of SiC filler in the matrix, and also contributes to the SiC particles’ chains. Compared with the untreated SiC/LDPE composite, the electric-field assisted composites show more distinct nonlinear conductivity characteristics when the DC assisted electric field exceeds 0.3 kV mm−1, which is attributed to the percolation phenomenon of SiC particles. This work is helpful to design the dielectric functionally graded materials, and to self-homogenize the electric field distribution in power apparatus and electronic devices.

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Nanomaterials in microchip electrophoresis – A review

Cited by 8 publications

References 130 publications

A Review of Methods to Modify the PDMS Surface Wettability and Their Applications

A Review of Methods to Modify the PDMS Surface Wettability and Their Applications

On-Chip Photonic Detection Techniques for Non-Invasive In Situ Characterizations at the Microfluidic Scale

DC assisted electric field on the improvement of the nonlinear electrical conductivity of SiC/LDPE field grading composites

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