Entropy Content During Nanometric Stick-Slip Motion
To explore the existence of self-organization during friction, this paper considers the motion of all atoms in a systems consisting of an Atomic Force Microscope metal tip sliding on a metal slab. The tip and the slab are set in relative motion with constant velocity. The vibrations of individual at...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-06-01
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| Series: | Entropy |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1099-4300/16/6/3062 |
| _version_ | 1811300891303608320 |
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| author | Paul Creeger Fredy Zypman |
| author_facet | Paul Creeger Fredy Zypman |
| author_sort | Paul Creeger |
| collection | DOAJ |
| description | To explore the existence of self-organization during friction, this paper considers the motion of all atoms in a systems consisting of an Atomic Force Microscope metal tip sliding on a metal slab. The tip and the slab are set in relative motion with constant velocity. The vibrations of individual atoms with respect to that relative motion are obtained explicitly using Molecular Dynamics with Embedded Atom Method potentials. First, we obtain signatures of Self Organized Criticality in that the stick-slip jump force probability densities are power laws with exponents in the range (0.5, 1.5) for aluminum and copper. Second, we characterize the dynamical attractor by the entropy content of the overall atomic jittering. We find that in all cases, friction minimizes the entropy and thus makes a strong case for self-organization. |
| first_indexed | 2024-04-13T06:59:07Z |
| format | Article |
| id | doaj.art-b0f8a317fd9b4c8a82bf0549460c45a2 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-13T06:59:07Z |
| publishDate | 2014-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-b0f8a317fd9b4c8a82bf0549460c45a22022-12-22T02:57:10ZengMDPI AGEntropy1099-43002014-06-011663062307310.3390/e16063062e16063062Entropy Content During Nanometric Stick-Slip MotionPaul Creeger0Fredy Zypman1Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033, USADepartment of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033, USATo explore the existence of self-organization during friction, this paper considers the motion of all atoms in a systems consisting of an Atomic Force Microscope metal tip sliding on a metal slab. The tip and the slab are set in relative motion with constant velocity. The vibrations of individual atoms with respect to that relative motion are obtained explicitly using Molecular Dynamics with Embedded Atom Method potentials. First, we obtain signatures of Self Organized Criticality in that the stick-slip jump force probability densities are power laws with exponents in the range (0.5, 1.5) for aluminum and copper. Second, we characterize the dynamical attractor by the entropy content of the overall atomic jittering. We find that in all cases, friction minimizes the entropy and thus makes a strong case for self-organization.http://www.mdpi.com/1099-4300/16/6/3062friction entropynanofrictionstick slipself-organized criticality |
| spellingShingle | Paul Creeger Fredy Zypman Entropy Content During Nanometric Stick-Slip Motion Entropy friction entropy nanofriction stick slip self-organized criticality |
| title | Entropy Content During Nanometric Stick-Slip Motion |
| title_full | Entropy Content During Nanometric Stick-Slip Motion |
| title_fullStr | Entropy Content During Nanometric Stick-Slip Motion |
| title_full_unstemmed | Entropy Content During Nanometric Stick-Slip Motion |
| title_short | Entropy Content During Nanometric Stick-Slip Motion |
| title_sort | entropy content during nanometric stick slip motion |
| topic | friction entropy nanofriction stick slip self-organized criticality |
| url | http://www.mdpi.com/1099-4300/16/6/3062 |
| work_keys_str_mv | AT paulcreeger entropycontentduringnanometricstickslipmotion AT fredyzypman entropycontentduringnanometricstickslipmotion |