Reversible electron-induced conductance in polymer nanostructures

Laracuente, A. R.; Yang, M. J.; Lee, W. K.; Senapati, L.; Baldwin, Jeffrey W.; Sheehan, Paul E.; King, William P.; Erwin, Steven C.; Whitman, L. J.

doi:10.1063/1.3428963

Cited by 6 publications

(6 citation statements)

References 43 publications

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“…In thermal DPN (tDPN), an AFM cantilever with an integrated resistive heater at the tip deposits inks that are solid at room temperature but that can flow at elevated temperature. Heated AFM tips can deposit nanometer-scale patterns of polymers [13][14][15][16], metals [17], and polymer-nanoparticle composites [18].…”

Section: Introductionmentioning

confidence: 99%

Nanometer-scale flow of molten polyethylene from a heated atomic force microscope tip

et al. 2012

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We investigate the nanometer-scale flow of molten polyethylene from a heated atomic force microscope (AFM) cantilever tip during thermal dip-pen nanolithography (tDPN). Polymer nanostructures were written for cantilever tip temperatures and substrate temperatures controlled over the range 100-260 °C and while the tip was either moving with speed 0.5-2.0 µm s(-1) or stationary and heated for 0.1-100 s. We find that polymer flow depends on surface capillary forces and not on shear between tip and substrate. The polymer mass flow rate is sensitive to the temperature-dependent polymer viscosity. The polymer flow is governed by thermal Marangoni forces and non-equilibrium wetting dynamics caused by a solidification front within the feature.

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Section: Introductionmentioning

confidence: 99%

Nanometer-scale flow of molten polyethylene from a heated atomic force microscope tip

et al. 2012

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“…PDDT is also interesting because it becomes highly ordered, forming self-assembled layers on a silicon surface [ 14 ], when it is properly annealed. This ordering increases its ability to conduct current after electron beam exposure [ 15 ].…”

Section: Resultsmentioning

confidence: 99%

Direct-write polymer nanolithography in ultra-high vacuum

Lee¹,

Yang²,

Laracuente³

et al. 2012

Beilstein J. Nanotechnol.

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SummaryPolymer nanostructures were directly written onto substrates in ultra-high vacuum. The polymer ink was coated onto atomic force microscope (AFM) probes that could be heated to control the ink viscosity. Then, the ink-coated probes were placed into an ultra-high vacuum (UHV) AFM and used to write polymer nanostructures on surfaces, including surfaces cleaned in UHV. Controlling the writing speed of the tip enabled the control over the number of monolayers of the polymer ink deposited on the surface from a single to tens of monolayers, with higher writing speeds generating thinner polymer nanostructures. Deposition onto silicon oxide-terminated substrates led to polymer chains standing upright on the surface, whereas deposition onto vacuum reconstructed silicon yielded polymer chains aligned along the surface.

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“…It was found that the width of the deposited line depends on the tip load, cantilever Overview of relevant nanofabrication processes after addition of material to the sample from a heated tip. a Direct deposition of a molten material 108,[111][112][113][114][115][116]127 or a loaded carrier matrix (e.g., polymer containing nanoparticles), which can be removed after the transfer 117 . b Direct deposition of a resist for dry etching into the substrate material 118,121 .…”

Section: Direct Deposition Of Functional Materialsmentioning

confidence: 99%

Thermal scanning probe lithography—a review

et al. 2020

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Fundamental aspects and state-of-the-art results of thermal scanning probe lithography (t-SPL) are reviewed here. t-SPL is an emerging direct-write nanolithography method with many unique properties which enable original or improved nano-patterning in application fields ranging from quantum technologies to material science. In particular, ultrafast and highly localized thermal processing of surfaces can be achieved through the sharp heated tip in t-SPL to generate high-resolution patterns. We investigate t-SPL as a means of generating three types of material interaction: removal, conversion, and addition. Each of these categories is illustrated with process parameters and application examples, as well as their respective opportunities and challenges. Our intention is to provide a knowledge base of t-SPL capabilities and current limitations and to guide nanoengineers to the best-fitting approach of t-SPL for their challenges in nanofabrication or material science. Many potential applications of nanoscale modifications with thermal probes still wait to be explored, in particular when one can utilize the inherently ultrahigh heating and cooling rates.

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Reversible electron-induced conductance in polymer nanostructures

Cited by 6 publications

References 43 publications

Nanometer-scale flow of molten polyethylene from a heated atomic force microscope tip

Nanometer-scale flow of molten polyethylene from a heated atomic force microscope tip

Direct-write polymer nanolithography in ultra-high vacuum

Thermal scanning probe lithography—a review

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