Results 41 to 50 of about 1,058 (154)

Manipulation of nanoparticles of different shapes inside a scanning electron microscope

open access: yesBeilstein Journal of Nanotechnology, 2014
In this work polyhedron-like gold and sphere-like silver nanoparticles (NPs) were manipulated on an oxidized Si substrate to study the dependence of the static friction and the contact area on the particle geometry.
Boris Polyakov   +7 more
doaj   +1 more source

Experimental Investigations of Biological Lubrication at the Nanoscale: The Cases of Synovial Joints and the Oral Cavity

open access: yesLubricants, 2013
Interactions between surfaces are ubiquitous phenomena in living organisms. Nature has developed sophisticated strategies for lubricating these systems, increasing their efficiency and life span.
Javier Sotres, Thomas Arnebrant
doaj   +1 more source

Rethinking Models of DNA Organization in Micrometer‐Sized Chromosomes from the Perspective of the Nanoproperties of Chromatin Favoring a Multilayer Structure

open access: yesSmall Structures, Volume 5, Issue 10, October 2024.
The relationship between the self‐associative properties of nucleosomes at the nanoscale and the micrometric structure of chromosomes is highlighted in this perspective. The multilayer chromosome model, in which the stacked structure is maintained by weak face‐to‐face interactions between nucleosomes in adjacent layers, is compatible with all the ...
Joan‐Ramon Daban
wiley   +1 more source

Topographical and Tribological Characteristics of Asian Human Hair Cuticles

open access: yesMathematical Problems in Engineering, Volume 2015, Issue 1, 2015., 2015
The topography and frictional force of Asian black male and female hair cuticles at different locations are determined using atomic force microscopy (AFM) and friction force microscopy (FFM). The frictional values, mapped for comparison with surface morphology, corresponded qualitatively with the structures’ plane surface characteristics.
Chia-Ling Chang   +3 more
wiley   +1 more source

Interlayer Friction and Adhesion Effects in Penta‐PdSe2‐Based van der Waals Heterostructures

open access: yesAdvanced Science, Volume 11, Issue 34, September 11, 2024.
The greater the difference in ionicity between the two 2D materials comprising the sliding interfaces is, the lower the interlayer friction, providing key criteria for designing ultralow friction 2D material friction pairs. Abstract Due to their inherent lattice mismatch characteristics, 2D heterostructure interfaces are considered ideal for achieving ...
Guoliang Ru   +5 more
wiley   +1 more source

Nonmonotonic load‐dependence of friction during nanoparticle manipulation

open access: yesMicro &Nano Letters, Volume 19, Issue 4, July 2024.
The friction, wear and energy loss between two contact interfaces strongly depend on the motion state (sliding or rolling) of nanoparticles (NPs) when applied as nano‐additive in the fields of lubrication or ultra‐precision manufacturing. Here, the tests to manipulate single SiO2 nanoparticle (NP) on silicon surface using a nanoscale probe detected the
Chunsheng Luo   +5 more
wiley   +1 more source

Nanotribology and nanomechanics: an introduction

open access: yes, 2017
This textbook and comprehensive reference source and serves as a timely, practical introduction to the principles of nanotribology and nanomechanics.
Bhushan, Bharat
core   +1 more source

Effect of normal load and roughness on the nanoscale friction coefficient in the elastic and plastic contact regime

open access: yesBeilstein Journal of Nanotechnology, 2013
The influence of applied normal load and roughness on the tribological behavior between the indenter and sample surface during nanoindentation-based scratching has been experimentally investigated by using different surfaces (fused silica and diamond ...
Aditya Kumar   +2 more
doaj   +1 more source

Macroscale Superlubricity on Nanoscale Graphene Moiré Structure‐Assembled Surface via Counterface Hydrogen Modulation

open access: yesAdvanced Science, Volume 11, Issue 19, May 22, 2024.
By sphere‐triggered strain engineering, the graphene moiré structure (GMS)‐assembled surfaces are formed. The superlubricity between GMS‐assembled and DLC25 surfaces in wide ranges of normal load (7–11 N), sliding velocity (0.5–27 cm s−1), contact area (0.4×104–3.7×104 µm2), and contact pressure (0.19–1.82 GPa) can be achieved based on assembly face ...
Yongfu Wang   +4 more
wiley   +1 more source

Contact size effects on the friction and wear of amorphous carbon films

open access: yesApplied Surface Science Advances, 2022
Since different properties of coating systems influence their friction and wear at different length scales contact size can play a critical role in microtribological experiments.
Ben D. Beake   +2 more
doaj   +1 more source

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