Persistent microscopic charge patterns in amorphous silicon thin films for guided assembly of colloids

Rezek, Bohuslav; Stuchlı́k, J.; Kočka, J.; Stemmer, Andreas

doi:10.1016/j.jnoncrysol.2005.07.025

Cited by 13 publications

(9 citation statements)

References 21 publications

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“…(That process used the inherent differences in contact electrification of various polymers, in contrast to the rational, chemically directed contact electrification we describe herein.) Patterns of charge, created by electron‐beam writing,11 an atomic force microscopy (AFM) tip,12 or electrical microcontact printing13 on a dielectric surface, can guide the self‐assembly of micro‐ or nanoparticles with sub‐100 nm lateral resolution 14…”

Section: Methodsmentioning

confidence: 99%

Electrostatic Self‐Assembly of Polystyrene Microspheres by Using Chemically Directed Contact Electrification

2006

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Stick with me: Electrostatic charges can be induced in functionalized polystyrene beads. Oppositely charged beads then aggregate to form superstructures. A coat of small beads can self‐assemble around a large bead (see optical microscopy image). After annealing, another layer of beads can be added. The technique, based on contact electrification, avoids the use of expensive equipment and enables the use of large quantities of material.

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Section: Methodsmentioning

confidence: 99%

Electrostatic Self‐Assembly of Polystyrene Microspheres by Using Chemically Directed Contact Electrification

2006

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“…15 [46] it is demonstrated that for applied positive tip voltages the topography is unchanged and so oxidation can be excluded, while the profile of the surface potential (recorded by measuring in parallel Kelvin Force Microscopy -KFM) is changed, clearly indicating important role of metastable charge trapping. All experimental details and procedures are in detail described in [45,46], important is that due to the low re-emission probability of the trapped charge the charge patterns persist for long enough time (up to 17 hours).…”

Section: Non-traditional Preparation Of Polycrystalline Siliconmentioning

confidence: 99%

“…16, has been achieved [46] and it has been shown that the exposure to water (needed for biological applications) has no influence or even improves the contrast of the recorded charge patterns [46]. …”

Section: Non-traditional Preparation Of Polycrystalline Siliconmentioning

confidence: 99%

The physics and technological aspects of the transition from amorphous to microcrystalline and polycrystalline silicon

Kočka

Fejfar

Mates

et al. 2004

phys. stat. sol. (c)

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Silicon thin films grown near the boundary between the amorphous/microcrystalline growth offer superior properties for industrial applications. Series of silicon samples, in which crossing of this transition region was achieved by changing a single technological parameter (dilution of silane in hydrogen, deposition temperature, sample thickness) were used to test our model of transport, connecting the macroscopically observed transport properties and the crystallinity, hydrogen content, grain size and grain boundaries. Microscopic study by AFM led to the formulation of the geometrical model of growth of mixed phase Si. The demand for research of microcrystalline or polycrystalline silicon prepared at low substrate temperatures is stimulated by the use of cheap plastic substrates. In addition to a direct deposition an alternative technology, such as metal-induced crystallization supported by the electric field is discussed. Possible future application of thin silicon films, for example in a "nanolithography", is also shown.

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“…[10] (That process used the inherent differences in contact electrification of various polymers, in contrast to the rational, chemically directed contact electrification we describe herein.) Patterns of charge, created by electron-beam writing, [11] an atomic force microscopy (AFM) tip, [12] or electrical microcontact printing [13] on a dielectric surface, can guide the self-assembly of micro-or nanoparticles with sub-100 nm lateral resolution. [14] Although contact electrification is a familiar phenomenon, the detailed mechanisms of contact electrification are not known, and it is likely that different mechanisms may be involved depending on the specific materials and environmental conditions.…”

mentioning

confidence: 99%

Electrostatic Self‐Assembly of Polystyrene Microspheres by Using Chemically Directed Contact Electrification

2006

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Bleib bei mir: Elektrostatisch unterschiedlich geladene funktionalisierte Polystyrolkügelchen aggregieren zu Überstrukturen. Eine Hülle aus kleinen Kügelchen kann sich um ein großes Kügelchen anlagern (siehe Mikroskopaufnahme). Nach dem Tempern kann eine weitere Schicht Kügelchen angefügt werden. Diese Technik, die auf einer Kontaktelektrifizierung beruht, benötigt keine teuren Geräte und ermöglicht das Arbeiten mit großen Mengen Material.

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Persistent microscopic charge patterns in amorphous silicon thin films for guided assembly of colloids

Cited by 13 publications

References 21 publications

Electrostatic Self‐Assembly of Polystyrene Microspheres by Using Chemically Directed Contact Electrification

Electrostatic Self‐Assembly of Polystyrene Microspheres by Using Chemically Directed Contact Electrification

The physics and technological aspects of the transition from amorphous to microcrystalline and polycrystalline silicon

Electrostatic Self‐Assembly of Polystyrene Microspheres by Using Chemically Directed Contact Electrification

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