Fabrication of platinum-decorated single-walled carbon nanotube based hydrogen sensors by aerosol jet printing

Li, Rui; Ding, Haiyan; Lin, Jian; Shen, Fangping; Cui, Zheng; Zhang, Ting

doi:10.1088/0957-4484/23/50/505301

Cited by 71 publications

(55 citation statements)

References 29 publications

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“…Note that the stand-off distance between the substrate and the nozzle tip along with the jetting from a tilted nozzle allows the printing over a curved surface-a unique capability for the Aerosol Jet direct write processes. The Aerosol Jet micro-additive printing method has been used in the manufacturing process for solar cells [16,17], microelectronics [18,19], and sensors [20][21][22]. The nozzle exit diameter for the polymer posts was 200 µm and for the printed silver lines it was 150 µm (the minimum line width is about 10 times smaller than the nozzle diameter based upon the sheath gas pressure).…”

Section: Manufacturing Processmentioning

confidence: 99%

Aerosol based direct-write micro-additive fabrication method for sub-mm 3D metal-dielectric structures

Rahman

Renaud

Heo

et al. 2015

J. Micromech. Microeng.

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The fabrication of 3D metal-dielectric structures at sub-mm length scale is highly important in order to realize low-loss passives and GHz wavelength antennas with applications in wearable and Internet-of-Things (IoT) devices. The inherent 2D nature of lithographic processes severely limits the available manufacturing routes to fabricate 3D structures. Further, the lithographic processes are subtractive and require the use of environmentally harmful chemicals. In this letter, we demonstrate an additive manufacturing method to fabricate 3D metal-dielectric structures at sub-mm length scale. A UV curable dielectric is dispensed from an Aerosol Jet system at 10-100 µm length scale and instantaneously cured to build complex 3D shapes at a length scale <1 mm. A metal nanoparticle ink is then dispensed over the 3D dielectric using a combination of jetting action and tilted dispense head, also using the Aerosol Jet technique and at a length scale 10-100 µm, followed by the nanoparticle sintering. Simulation studies are carried out to demonstrate the feasibility of using such structures as mm-wave antennas. The manufacturing method described in this letter opens up the possibility of fabricating an entirely new class of custom-shaped 3D structures at a sub-mm length scale with potential applications in 3D antennas and passives.

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Section: Manufacturing Processmentioning

confidence: 99%

Aerosol based direct-write micro-additive fabrication method for sub-mm 3D metal-dielectric structures

Rahman

Renaud

Heo

et al. 2015

J. Micromech. Microeng.

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“…Aerosol‐jet based 3‐D printing, or AJP, has emerged as an important additive manufacturing technique offering several key advantages as compared to other direct writing (DW) printing methods, such as syringe/extrusion and ink‐jet printing. For example, it is possible to conduct AJP with a working distance (i.e., the distance between the printer nozzle exit and the target printing surface) in the range of 1–5 mm, thereby ensuring that the AJP technique is adaptable to complex and delicate surface topologies.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Droplet Sizes on Overspray in Aerosol‐Jet Printing

Guang¹,

Gu²,

Tsang

et al. 2018

Adv Eng Mater

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One of the most important concerns of aerosol-jet based printing (AJP) is the substantial amount of overspray (OS) that can accompany printed traces. In this study, the authors develop a full, three-dimensional (3-D) computational fluid dynamics (CFD) model of the aerosol carrier gas flow (CGF), that is, confined by an annular sheath gas flow (ShGF) during the AJP process. The authors then use this model to pinpoint the fundamental fluid mechanics principles that control the OS in a standard AJP process as a function of the droplet size distribution and the ShGF rate. In their model, the authors consider the trajectories of various sized, monodisperse droplets in an inkstream in order to unravel the manner in which the OS is dictated by the intricate interplay between drop size and both gas flow (CGF and ShGF) rates. Their results explain several experimental results, namely 1) that there is an abundance of smaller sized drops in the OS region at low ShGF rates; 2) that the OS first reduces and then increases as the ShGF rate increases; and 3) that there is no longer a prevalence of smaller particles in the OS region at larger ShGF rates. The authors also discuss the hitherto unaddressed issues related to how 1) the large impact velocity of the ink droplets at the substrate surface (and the resultant Weber number) and 2) the misalignment between the CGF and the cylindrical axis of the ShGF annulus appear to affect OS. The authors anticipate that their analysis will provide an important understanding in the optimization of operating parameters for AJP with respect to OS that can result in an overall improvement in printing resolution.

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“…Functional printing has evolved from fabricating parts using a single material, to make multifunctional components using two or more materials. There is tremendous interest in functional printing, where different printing techniques [1] are used to make devices such as antennas [2] [3] [4] [5], electrical circuit components [6] [7] [8] [9] [10], and sensors [11] [12] [13] [14]. Metallic inks are often used to fabricate 2D and 3D structures to conduct heat and electricity.…”

Section: Introductionmentioning

confidence: 99%

Formation of Copper Nickel Bimetallic Nanoalloy Film Using Precursor Inks

Mahajan¹,

Marotta²,

Kahn³

et al. 2019

MSA

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Precursor (Metal-organic decomposition (MOD)) inks are used to fabricate 2D and 3D printed conductive structures directly onto a substrate. By formulating a nanoalloy structure containing multiple metals, the opportunity to modify chemical and physical properties exists. In this paper, a copper-nickel bimetallic nanoalloy film was fabricated by mixing copper and nickel precursor inks and sintering them in vacuum. The individual elemental inks were formulated and characterized using SEM, EDS, and XRD. During thermal processing, elemental copper forms first and is followed by the formation of bimetallic copper-nickel alloy. The encapsulation of the underlying copper by the nickel-rich alloy provides excellent oxidation resistance. No change in film resistance was observed after the film was exposed to an oxygen plasma. Nanoalloy films printed using reactive metallic inks have a variety of important applications involving local control of alloy composition. Examples include facile formation of layered nanostructures, and electrical conductivity with oxidative stability.

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Fabrication of platinum-decorated single-walled carbon nanotube based hydrogen sensors by aerosol jet printing

Cited by 71 publications

References 29 publications

Aerosol based direct-write micro-additive fabrication method for sub-mm 3D metal-dielectric structures

Aerosol based direct-write micro-additive fabrication method for sub-mm 3D metal-dielectric structures

The Effect of Droplet Sizes on Overspray in Aerosol‐Jet Printing

Formation of Copper Nickel Bimetallic Nanoalloy Film Using Precursor Inks

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