Nanotribological characterization of self-assembled monolayers deposited on silicon and aluminium substrates

Tambe, Nikhil S; Bhushan, Bharat

doi:10.1088/0957-4484/16/9/024

Cited by 95 publications

(66 citation statements)

References 36 publications

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“…A 'continuous microscratch' technique developed for an AFM by Sundararajan & Bhushan (2001) gave a direct dependence of the scratch/wear depth on the applied normal load and has been used for understanding critical loads for 'visible' wear damage (Sundararajan & Bhushan 2001;Liu & Bhushan 2002;Tambe & Bhushan 2005g). Figure 1 shows a typical scanning electron microscopic image of such a wear mark and the associated wear particles.…”

Section: Measurement Techniquementioning

confidence: 99%

Nanoscale friction and wear maps

Tambe¹,

Bhushan

2007

Phil. Trans. R. Soc. A.

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Friction and wear are part and parcel of all walks of life, and for interfaces that are in close or near contact, tribology and mechanics are supremely important. They can critically influence the efficient functioning of devices and components. Nanoscale friction force follows a complex nonlinear dependence on multiple, often interdependent, interfacial and material properties. Various studies indicate that nanoscale devices may behave in ways that cannot be predicted from their larger counterparts. Nanoscale friction and wear mapping can help identify some 'sweet spots' that would give ultralow friction and near-zero wear. Mapping nanoscale friction and wear as a function of operating conditions and interface properties is a valuable tool and has the potential to impact the very way in which we design and select materials for nanotechnology applications.

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Section: Measurement Techniquementioning

confidence: 99%

Nanoscale friction and wear maps

Tambe¹,

Bhushan

2007

Phil. Trans. R. Soc. A.

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“…The current solutions to the tribological issues with MEMS are either to increase the surface 144 Nano Res (2009) 2: 143 150 Nano Research roughness through surface texturing or to improve the surface hydrophobicity through chemically modifying the silicon MEMS structure surfaces [7,8]. Chemically modifying a smooth silicon surface can only lead to a hydrophobic surface with WCA of up to 120° [9]. However, by combining surface chemical modifi cation and topography modifi cation, superhydrophobic surfaces with WCAs above 150° can be achieved [2,3], which enables further improvement of the tribological performance of MEMS devices.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic surfaces produced by applying a self-assembled monolayer to silicon micro/nano-textured surfaces

et al. 2009

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A novel way of producing superhydrophobic surfaces by applying a self-assembled monolayer (SAM) to silicon micro/nano-textured surfaces is presented in this paper. The micro/nano-textured surfaces on silicon substrates were generated by the aluminum-induced crystallization (AIC) of amorphous silicon (a-Si) technique. Octadecyltrichlorosilane (OTS) SAMs were then applied to the textured surfaces by dip coating. The topography and wetting properties of the resulting surfaces were characterized using scanning electron microscopy (SEM) and a video-based contact angle measurement system. The results show that by introducing OTS SAMs on the silicon micro/nano-textured surfaces, superhydrophobic surfaces with water contact angles (WCAs) of 155° were obtained, as compared to the WCAs of OTS-modifi ed smooth silicon surfaces of about 112°. Surface topography was found to directly infl uence the WCA as predicted by the Cassie-Baxter model.

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“…For thin films/coatings, SAMs have low elastic modulus [33] and so the reduction in contact area is not significant. To reduce friction, a complex chemistry has to work such that the suitable selections of end groups, chain length and mixture of monolayers have to be taken into account [8]. Further, achieving uniform coating of SAMs on large surface areas without defects or polymerization poses a great challenge.…”

Section: Discussionmentioning

confidence: 99%

“…Examples include self-assembled monolayers (SAMs) [8], diamond-like carbon (DLC) coatings [9], and also vapor phase lubricants [4]. In order to overcome some of the limitations of chemical modifications, bio-inspired topographical modification of surfaces has recently emerged as an effective route to minimize friction at micro/nano-scale.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic patterned surfaces for controllable friction in micro- and nanoscale devices

Singh

Suh

2013

Micro Nano Syst Lett

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Biomimetics is the study and simulation of biological systems for desired functional properties. It involves the transformation of underlying principles discovered in nature into man-made technologies. In this context, natural surfaces have significantly inspired and motivated new solutions for micro-and nano-scale devices (e.g., Micro/ Nano-Electro-Mechanical Systems, MEMS/NEMS) towards controllable friction, during their operation. As a generic solution to reduce friction at small scale, various thin films/coatings have been employed in the last few decades. In recent years, inspiration from 'Lotus Effect' has initiated a new research direction for controllable friction with biomimetic patterned surfaces. By exploiting the intrinsic hydrophobicity and ability to reduce contact area, such micro-or nano-patterned surfaces have demonstrated great strength and potential for applications in MEMS/NEMS devices. This review highlights recent advancements on the design, development and performance of these biomimetic patterned surfaces. Also, we present some hybrid approaches to tackle current challenges in biomimetic tribological applications for MEMS/NEMS devices.

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Nanotribological characterization of self-assembled monolayers deposited on silicon and aluminium substrates

Cited by 95 publications

References 36 publications

Nanoscale friction and wear maps

Nanoscale friction and wear maps

Superhydrophobic surfaces produced by applying a self-assembled monolayer to silicon micro/nano-textured surfaces

Biomimetic patterned surfaces for controllable friction in micro- and nanoscale devices

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