Measurement of the friction between single polystyrene nanospheres and silicon surface using atomic force microscopy.

In the present work, the individual nanoparticles have been manipulated on a silicon surface, using atomic force microscope (AFM) techniques. As a model system, near-spherical polystyrene nanoparticles with radii from 28.85 nm to 228.2 nm were deposited on a nanosmooth silicon wafer. Experiments demonstrated that when the normal force is above a threshold load, nanoparticles could steadily be pushed by the tip of the AFM along the defined pathway. The tests allow us to quantitatively study the interfacial friction between the nanoparticle and the surface. It was found that the friction could be affected by various factors such as the load, the particle size, and the surface treatment. The results showed that the friction between particles and substrate is proportional to the two-third power of the radius, which is in agreement with the Hertzian theory. It can also be seen that the ratio between the kinetic and the static friction was slightly changed from 0.3 to 0.6, depending on the size of the particles. However, the value of the ratio was little affected by other factors such as the particles' location, the tip normal force and the surface modification. The results provided new insights into the intriguing friction phenomenon on the nanoscale.

[1]  W. Peukert,et al.  Molecular dynamics simulations of the contact between two NaCl nano-crystals: adhesion, jump to contact and indentation , 2003 .

[2]  Hertz.  On the Contact of Elastic Solids , 1882 .

[3]  P. Reimann,et al.  Force dependence of transition rates in atomic friction. , 2006, Physical review letters.

[4]  U. Landman,et al.  Nanotribology: friction, wear and lubrication at the atomic scale , 1995, Nature.

[5]  R. Wiesendanger,et al.  QUANTITATIVE ANALYSIS OF THE FRICTIONAL PROPERTIES OF SOLID MATERIALS AT LOW LOADS. II. MICA AND GERMANIUM SULFIDE , 1997 .

[6]  H. Fuchs,et al.  Transition from static to kinetic friction of metallic nanoparticles , 2009 .

[7]  C. Lieber,et al.  Nanotribology and Nanofabrication of MoO3 Structures by Atomic Force Microscopy , 1996, Science.

[8]  D. F. Ogletree,et al.  High Frictional Anisotropy of Periodic and Aperiodic Directions on a Quasicrystal Surface , 2005, Science.

[9]  L. Qian,et al.  Dynamic friction by polymer/surfactant mixtures adsorbed on surfaces , 2004 .

[10]  L. Howald,et al.  Sled-Type Motion on the Nanometer Scale: Determination of Dissipation and Cohesive Energies of C60 , 1994, Science.

[11]  Ion Marius Sivebæk,et al.  On the nature of the static friction, kinetic friction and creep , 2003 .

[12]  M. Salmeron,et al.  Scratching the Surface: Fundamental Investigations of Tribology with Atomic Force Microscopy. , 1997, Chemical reviews.

[13]  Meyer,et al.  Velocity dependence of atomic friction , 2000, Physical review letters.

[14]  Valentin L. Popov,et al.  A theory of the transition from static to kinetic friction in boundary lubrication layers , 2000 .

[15]  G. McClelland,et al.  Atomic-scale friction of a tungsten tip on a graphite surface. , 1987, Physical review letters.

[16]  Metin Sitti,et al.  Rolling and Spinning Friction Characterization of Fine Particles Using Lateral Force Microscopy Based Contact Pushing , 2008 .

[17]  Harald Fuchs,et al.  Frictional duality observed during nanoparticle sliding. , 2008, Physical review letters.

[18]  Rubén Álvarez Asencio,et al.  Ionic liquid nanotribology: stiction suppression and surface induced shear thinning. , 2012, Langmuir : the ACS journal of surfaces and colloids.

[19]  Harald Fuchs,et al.  Interfacial friction obtained by lateral manipulation of nanoparticles using atomic force microscopy techniques , 2007 .

[20]  D. F. Ogletree,et al.  Atomic Force Microscopy Study of an Ideally Hard Contact: The Diamond(111)/Tungsten Carbide Interface , 1998 .

[21]  H. Fuchs,et al.  Tip-jump statistics of stick-slip friction , 2005 .

[22]  C. Herding,et al.  Quantifying Pathways and Friction of Nanoparticles During Controlled Manipulation by Contact-Mode Atomic Force Microscopy , 2010 .

[23]  Persson.  Theory and simulation of sliding friction. , 1993, Physical review letters.

[24]  Mark A. Lantz,et al.  Atomic-force-microscope study of contact area and friction on NbSe2 , 1997 .

[25]  B. Luan,et al.  The breakdown of continuum models for mechanical contacts , 2005, Nature.

[26]  B. Bhushan,et al.  A nanoscale friction investigation during the manipulation of nanoparticles in controlled environments , 2008, Nanotechnology.

[27]  Xiaodong Wang,et al.  Running-in process of Si-SiOx/SiO2 pair at nanoscale—Sharp drops in friction and wear rate during initial cycles , 2013 .

[28]  Richard M. Pashley,et al.  Direct measurement of colloidal forces using an atomic force microscope , 1991, Nature.

[29]  B. V. Derjaguin,et al.  Effect of contact deformations on the adhesion of particles , 1975 .

[30]  Bharat Bhushan,et al.  Scale dependence of micro/nano-friction and adhesion of MEMS/NEMS materials, coatings and lubricants , 2004 .

[31]  D. Maugis.  Adhesion of spheres : the JKR-DMT transition using a dugdale model , 1992 .

[32]  Izhak Etsion,et al.  An improved wedge calibration method for lateral force in atomic force microscopy , 2003 .

[33]  K. Kendall,et al.  Surface energy and the contact of elastic solids , 1971, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[34]  Klaus Rademann,et al.  Contact area dependence of frictional forces: Moving adsorbed antimony nanoparticles , 2005 .

[35]  M Grant,et al.  Thermal effects on atomic friction. , 2001, Physical review letters.

[36]  J. Bechhoefer,et al.  Calibration of atomic‐force microscope tips , 1993 .

[37]  Krim,et al.  Nanotribology of a Kr monolayer: A quartz-crystal microbalance study of atomic-scale friction. , 1991, Physical review letters.

[38]  R. Bennewitz,et al.  Control of nanoscale friction on gold in an ionic liquid by a potential-dependent ionic lubricant layer. , 2012, Physical review letters.

[39]  U. Schwarz,et al.  Measuring the friction of nanoparticles: a new route towards a better understanding of nanoscale friction. , 2009, Chemphyschem : a European journal of chemical physics and physical chemistry.

[40]  Klaus Rademann,et al.  Controlled translational manipulation of small latex spheres by dynamic force microscopy , 2002 .