Factors affecting the growth of micro/nano-sized tungsten whiskers synthesised by vapour deposition

Li, Guangyu; Song, Min; Liu, Xinli; He, Yuehui

doi:10.1080/14786435.2012.725952

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…The produced tungsten whiskers had a diameter of about 1–2 μm. In the same context, various factors (temperature, holding time, and position of the Si substrates) were studied by Liu et al to demonstrate their impact on tungsten whiskers grown using the chemical vapor deposition (CVD) method [ 72 ].…”

Section: Manufacturing Methodsmentioning

confidence: 99%

“…However, various techniques were proposed to produce the whiskers such as sol–gel template synthesis [ 76 ], a soft lithography approach [ 69 ] for the fabrication of nanostructures with well-defined dimensions and shapes, molten salt synthesis (MSS) [ 71 ], and chemical vapor deposition (CVD), which produced whiskers with a uniform straight shape, good rigidity, and high-density aligned whiskers [ 72 ].…”

Section: Manufacturing Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Review of Recent Bio-Inspired Design and Manufacturing of Whisker Tactile Sensors

Sayegh

Daraghma

Mekid

et al. 2022

Sensors

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Whisker sensors are a class of tactile sensors that have recently attracted attention. Inspired by mammals’ whiskers known as mystacial vibrissae, they have displayed tremendous potential in a variety of applications e.g., robotics, underwater vehicles, minimally invasive surgeries, and leak detection. This paper provides a supplement to the recent tactile sensing techniques’ designs of whiskers that only sense at their base, as well as the materials employed, and manufacturing techniques. The article delves into the technical specifications of these sensors, such as the resolution, measurement range, sensitivity, durability, and recovery time, which determine their performance. The sensors’ sensitivity varies depending on the measured physical quantity; for example, the pressure sensors had an intermediate sensitivity of 58%/Pa and a response time of around 90 ms, whereas the force sensors that function based on piezoelectric effects exhibited good linearity in the measurements with a resolution of 3 µN and sensitivity of 0.1682 mV/µN. Some sensors were used to perform spatial mapping and the identification of the geometry and roughness of objects with a reported resolution of 25 nm. The durability and recovery time showed a wide range of values, with the maximum durability being 10,000 cycles and the shortest recovery time being 5 ms. Furthermore, the paper examines the fabrication of whiskers at the micro- and nanoscales, as well as their contributions to mechanical and thermal behavior. The commonly used manufacturing techniques of 3D printing, PDMS casting, and screen printing were used in addition to several micro and nanofabrication techniques such as photolithography, etching, and chemical vapor deposition. Lastly, the paper discusses the main potential applications of these sensors and potential research gaps in this field. In particular, the operation of whisker sensors under high temperatures or high pressure requires further investigation, as does the design of sensors to explore larger topologies.

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Section: Manufacturing Methodsmentioning

confidence: 99%

Section: Manufacturing Methodsmentioning

confidence: 99%

Review of Recent Bio-Inspired Design and Manufacturing of Whisker Tactile Sensors

Sayegh

Daraghma

Mekid

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…W nanowires have been successfully fabricated by using chemical vapor deposition [12][13][14][15] or by electrochemical etching of a eutectic W alloy [16]. However, investigations of the mechanical properties of W nanowires have been scarce and this field has remained largely unexplored [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Graphene-coated tungsten nanowires deliver unprecedented modulus and strength

Wang

Guo

et al. 2018

Materials Research Letters

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Tungsten (W) nanowires have a wide range of chemical, electronic, and mechanical applications. However, the modulus and strength of traditional W nanowires are quite low, and how to improve their mechanical performance remains a challenge. Here, we describe a novel graphene-coated W nanowires that demonstrate a Young's modulus of 885 GPa (twice that of W) and a fracture strength of up to 24.7 GPa (66% of the ideal strength). Both the Young's modulus and the fracture strength show a strong size effect, resulting from the graphene-nanowire core-shell structure. IMPACT STATEMENT We report a novel graphene-coated W nanowires that demonstrate unprecedented Young's modulus (885 GPa, twice that of W) and fracture strength (24.7 GPa, 66% of the ideal strength).

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An investigation of the mechanical behaviors of micro-sized tungsten whiskers using nanoindentation

Song

Liu

et al. 2014

Materials Science and Engineering: A

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Factors affecting the growth of micro/nano-sized tungsten whiskers synthesised by vapour deposition

Cited by 4 publications

References 23 publications

Review of Recent Bio-Inspired Design and Manufacturing of Whisker Tactile Sensors

Review of Recent Bio-Inspired Design and Manufacturing of Whisker Tactile Sensors

Graphene-coated tungsten nanowires deliver unprecedented modulus and strength

An investigation of the mechanical behaviors of micro-sized tungsten whiskers using nanoindentation

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