Fabrication of Porous Gold Film Using Graphene Oxide as a Sacrificial Layer

Alazzam, Anas; Alamoodi, Nahla; Abutayeh, Mohammad; Stiharu, Ion; Nerguizian, Vahé

doi:10.3390/ma12142305

Cited by 16 publications

(11 citation statements)

References 33 publications

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“…Various fabrication techniques for thin films on top of flexible COC films have been reported. [185,[217][218][219][220] Alazzam et al [160,[218][219][220] established a method for fabricating thin films of reduced GO (rGO) using plasma-enhanced lift-off, which was then utilized in LOC applications. According to the results, GO adheres effectively to the surface of the COC.…”

Section: Organic Semiconductorsmentioning

confidence: 99%

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A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

Agha

Waheed

Alamoodi

et al. 2022

Macro Materials & Eng

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Cyclic olefin copolymers (COC) are amorphous, transparent thermoplastics composed of cyclic olefin monomers (norbornene) and linear olefins (ethene). They are increasingly utilized as fabrication materials for microsystems and microfluidic devices, owing to their promising features of low water absorption, high electrical insulation, long-term stability of surface treatments, and resistance to a broad variety of acids and solvents. Many manufacturing processes for COC-based devices have been developed in recent decades. These methodologies are categorized as replication methods or fast prototyping as common in fabrication of thermoplastic microfluidic devices. This review gives a full discussion of the features of COCs, the various production processes, and the numerous selected applications in microfluidic platforms. The review also explores COC's composition and fundamental features, as well as fabrication processes and applications in a variety of fields, investigates the material's potential advantages and uses, and attempts to create a comprehensive list of COC's possible benefits. Due to their unique features and simplicity of fabrication, COCs are projected to advance the future of microfluidics, microsystems, and optofluidics.

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Section: Organic Semiconductorsmentioning

confidence: 99%

“…The COC/GO devices were used to manipulate cells under dielectrophoresis [219] as well as droplet coalescence and manipulation. [160,[218][219][220] Other GO/COC applications have recently been reported. [161,217,[220][221][222][223] Abunahla et al [221,222] reported the memristive behavior of GO and rGO films.…”

Section: Organic Semiconductorsmentioning

confidence: 99%

A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

Agha

Waheed

Alamoodi

et al. 2022

Macro Materials & Eng

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“…GO is a hydrophilic material widely used in various fields, and it is composed of graphene sheets containing oxygen functional groups. [129,130] These functional groups form hydrogen bonds with water molecules to achieve the purpose of water transportation along with the sheet. Alazzam and Alamoodi [131] proposed a microfluidic device with a patterned GO film.…”

Section: Microfluidic Applications In Separation Of Continuous Liquid...mentioning

confidence: 99%

Polymer‐based microfluidic devices: A comprehensive review on preparation and applications

Han

Zhang

Tian

et al. 2021

Polymer Engineering & Sci

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As key components in life science, microfluidics devices play increasingly important roles in the fields of biomedicine, pharmaceuticals, and biology due to its high detection efficiency. Also, microfluidics devices have many applications in label-free detection, thanks to their low cost and ease of operation.Traditionally, microfluidic devices are fabricated with glass and silicon materials. As an alternative, polymer materials are commonly used in the fabrication of microfluidic devices for their lower cost, versatile fabrication methods, biocompatibility, and repeatability. In this review, the methods for fabricating polymer microfluidic systems are described in detail, including lithography, hot embossing and imprinting, soft lithography, laser ablation, 3D printing, and other technologies. In particular, the merits and demerits of each of the methods are discussed comprehensively. This review also focuses on the applications of polymer-based microfluidic systems in the areas of biology, medicine and production, typical application scenarios including blood, tumor cell and nucleic acid testing, oil adsorption detection, and pesticide detection. This review emphasizes the device preparation methods and application scenarios of polymer-based microfluidic systems and was expected to arise more extensive discussions in this field.

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“…These methods add additional chemicals and treatment steps that may add complexity to the fabrication process of microfluidic devices. Graphene oxide (GO) is another hydrophilic material that is widely used in various fields. , It consists of graphene sheets decorated with oxygen-containing functional groups. These negatively charged functional groups form hydrogen bonds with water molecules facilitating the transport of water along the sheets.…”

Section: Introductionmentioning

confidence: 99%

Microfluidic Devices with Patterned Wettability Using Graphene Oxide for Continuous Liquid–Liquid Two-Phase Separation

Alazzam

Alamoodi

2020

ACS Appl. Nano Mater.

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This article presents a simple method to pattern the surface energy of a substrate using standard microfabrication techniques. Microfluidic devices with hydrophobic polymer substrate patterned with hydrophilic graphene oxide (GO) for the separation of liquid–liquid two-phase systems are reported. The microdevice consists of a cyclic olefin copolymer (COC) substrate bonded to a polydimethylsiloxane (PDMS) element that includes a microchannel. The patterned GO film is characterized using scanning electron, atomic force, and metallurgical microscopies. The contact angle of water on COC surface is measured to be more than 120° and is approximately 10° on the GO-patterned COC surface. Different contact angles could be achieved by tuning the GO with oxygen containing functional groups as well as using different concentrations of GO dispersions. The device is used to separate dye-water droplets dispersed in silicone oil by steering the droplets toward a designated outlet. Using GO as a patterned thin film with tunable hydrophilicity allows for on-chip continuous full separation of water droplets at different flow rates.

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Fabrication of Porous Gold Film Using Graphene Oxide as a Sacrificial Layer

Cited by 16 publications

References 33 publications

A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

A Review of Cyclic Olefin Copolymer Applications in Microfluidics and Microdevices

Polymer‐based microfluidic devices: A comprehensive review on preparation and applications

Microfluidic Devices with Patterned Wettability Using Graphene Oxide for Continuous Liquid–Liquid Two-Phase Separation

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