scholarly journals Lifted graphene nanoribbons on gold: from smooth sliding to multiple stick-slip regimes

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 2073-2080 ◽  
Author(s):  
L. Gigli ◽  
N. Manini ◽  
E. Tosatti ◽  
R. Guerra ◽  
A. Vanossi
Keyword(s):  
Atomic Force Microscopy ◽  
Numerical Simulations ◽  
Graphene Nanoribbons ◽  
Stick Slip ◽  
Dynamic Transition ◽  
Force Microscopy ◽  
Atomic Force ◽  
Force Asymmetry ◽  
Pushing And Pulling

Picked up at one end, graphene nanoribbons can be made to slide on gold by atomic-force microscopy. Numerical simulations reveal, as a function of the lifting height, a surprising dynamic transition from smooth sliding to multiple stick-slip regimes, with a force asymmetry between the pushing and pulling directions.

scholarly journals Exploring Intramolecular Methyl–Methyl Coupling on a Metal Surface for Edge-Extended Graphene Nanoribbons

2021 ◽  
Vol 03 (02) ◽  
pp. 128-133
Author(s):  
Zijie Qiu ◽  
Qiang Sun ◽  
Shiyong Wang ◽  
Gabriela Borin Barin ◽  
Bastian Dumslaff ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Atomic Force Microscopy ◽  
High Resolution ◽  
Graphene Nanoribbons ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
Methyl Methyl ◽  
Atomic Force ◽  
Edge Extension

Intramolecular methyl–methyl coupling on Au (111) is explored as a new on-surface protocol for edge extension in graphene nanoribbons (GNRs). Characterized by high-resolution scanning tunneling microscopy, noncontact atomic force microscopy, and Raman spectroscopy, the methyl–methyl coupling is proven to indeed proceed at the armchair edges of the GNRs, forming six-membered rings with sp3- or sp2-hybridized carbons.

scholarly journals Cantilever signature of tip detachment during contact resonance AFM

2021 ◽  
Vol 12 ◽  
pp. 1286-1296
Author(s):  
Devin Kalafut ◽  
Ryan Wagner ◽  
Maria Jose Cadena ◽  
Anil Bajaj ◽  
Arvind Raman
Keyword(s):  
Atomic Force Microscopy ◽  
Numerical Simulations ◽  
Piezoresponse Force Microscopy ◽  
Average Force ◽  
Standard Equipment ◽  
Vibrational Signal ◽  
Essential Condition ◽  
Force Microscopy ◽  
Atomic Force ◽  
Contact Resonance

Contact resonance atomic force microscopy, piezoresponse force microscopy, and electrochemical strain microscopy are atomic force microscopy modes in which the cantilever is held in contact with the sample at a constant average force while monitoring the cantilever motion under the influence of a small, superimposed vibrational signal. Though these modes depend on permanent contact, there is a lack of detailed analysis on how the cantilever motion evolves when this essential condition is violated. This is not an uncommon occurrence since higher operating amplitudes tend to yield better signal-to-noise ratio, so users may inadvertently reduce their experimental accuracy by inducing tip–sample detachment in an effort to improve their measurements. We shed light on this issue by deliberately pushing both our experimental equipment and numerical simulations to the point of tip–sample detachment to explore cantilever dynamics during a useful and observable threshold feature in the measured response. Numerical simulations of the analytical model allow for extended insight into cantilever dynamics such as full-length deflection and slope behavior, which can be challenging or unobtainable in a standard equipment configuration. With such tools, we are able to determine the cantilever motion during detachment and connect the qualitative and quantitative behavior to experimental features.

A Novel AFM Chip for Fountain Pen Nanolithography - Design and Microfabrication

2003 ◽  
Vol 782 ◽  
Author(s):  
Keun-Ho Kim ◽  
Nicolaie Moldovan ◽  
Changhong Ke ◽  
Horacio D. Espinosa
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Fluid Flow ◽  
Numerical Simulations ◽  
Gold Substrate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Air Interface ◽  
Flow Through ◽  
Afm Probe

ABSTRACTA novel atomic force microscopy (AFM) probe has been developed to expand the capability and applications of dip-pen nanolithography (DPN) technology. This new probe has integrated microchannels and reservoirs for continuous ink feed, which allow “fountain-pen” writing called “Fountain Pen Nanolithography” (FPN). Ink is transported from the reservoirs through the microchannels and eventually dispensed onto substrates via a volcano-like dispensing tip. Numerical simulations have been performed to select optimal materials and suitable tip shapes providing a stable fluid-air interface in the tip. Microchannel and dispensing tip have been fabricated by surface micromachining, in particular employing 3 layers of thin films. Fluid flow through the microchannels has been experimentally examined. The probe was used to write on a gold substrate.

scholarly journals Tracking On-Surface Chemistry with Atomic Precision

Synlett ◽  
2017 ◽  
Vol 28 (19) ◽  
pp. 2509-2516 ◽  
Author(s):  
Peter Jacobse ◽  
Marc-Etienne Moret ◽  
Robertus Klein Gebbink ◽  
Ingmar Swart
Keyword(s):  
Atomic Force Microscopy ◽  
Single Molecule ◽  
Graphene Nanoribbons ◽  
Single Molecule Level ◽  
Force Microscopy ◽  
The Past ◽  
Atomic Force ◽  
Atomic Precision ◽  
Different Types ◽  
Insight Into

The field of on-surface synthesis has seen a tremendous development in the past decade as an exciting new methodology towards atomically well-defined nanostructures. A strong driving force in this respect is its inherent compatibility with scanning probe techniques, which allows one to ‘view’ the reactants and products at the single-molecule level. In this article, we review the ability of noncontact atomic force microscopy to study on-surface chemical reactions with atomic precision. We highlight recent advances in using noncontact atomic force microscopy to obtain mechanistic insight into reactions and focus on the recently elaborated mechanisms in the formation of different types of graphene nanoribbons.

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