Field emission microscope for a single fullerene molecule

Yanagisawa, Hirofumi; Bohn, Markus; Goschin, Florian; Seitsonen, Ari P.; Kling, Matthias F.

doi:10.1038/s41598-022-06670-1

Cited by 6 publications

(5 citation statements)

References 45 publications

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“…In the work presented in reference [22], we argued that the emitted electrons originate from the substrate metal and pass through only the protrusion molecules before emission, as depicted by the green arrows in Figure 1(e). We believe that in such an emission process, the resonant electron emission through single-molecule MOs occurs.…”

Section: Full Textmentioning

confidence: 90%

“…We used the same experimental setup as that used in our previous work [22] . Experiments of electron emission from a tip, namely eld emission were performed in an ultra-high vacuum chamber.…”

Section: Methodsmentioning

confidence: 99%

“…Here, we used a recently identi ed single-molecule electron source to realise the proposed idea. By applying strong direct-current (DC) electric elds to C 60 molecules deposited on a tip with a radius curvature of a few hundred nanometres, we recently identi ed that some single-molecule-terminated protrusions appeared on a molecular layer formed on the tip, as depicted in Figure 1(e) [22] . In this case, the electric elds became stronger at the protrusions, and the strong elds drove electron emissions from these individual molecules.…”

Section: Full Textmentioning

confidence: 99%

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Subnanometeric optical modulation of a single-molecule electron source

Yanagisawa

Bohn

Kitoh-Nishioka

et al. 2022

Preprint

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The irradiation of femtosecond light pulses onto nano-objects creates localised optical fields on the nanostructure surfaces. Plasmonic effects spatially modulate the local-field distribution, achieving optical control of an ultrafast electron source on a scale of approximately 10 nm. Further miniaturisation of such an electron source down to an atomistically small scale is technically difficult by modulating the local-field distribution via plasmonic effects. Here, by illuminating recently identified single-molecule electron sources with femtosecond light pulses, we discovered that largely modulated emission patterns appeared from single C60 molecules, approximately one nanometre in size. Our simulations revealed that the emission patterns represented the single-molecule molecular orbitals (MOs), and the observed modulations originated from the variations of the single-molecule MOs, practically achieving subnanometric optical modulation of an electron source. Our work has thus demonstrated a simple way to continue miniaturising the spatially-controlled electron source down to an atomistic scale using quantum effects.

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Section: Full Textmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Full Textmentioning

confidence: 99%

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Subnanometeric optical modulation of a single-molecule electron source

Yanagisawa

Bohn

Kitoh-Nishioka

et al. 2022

Preprint

Self Cite

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“…(e) In both FE and FI emission, investigating sub-atomic level and bond-level emission properties, where these can be now be observed experimentally (e.g. [142][143][144][145]).…”

Section: Atomistic Electrostatic Modellingmentioning

confidence: 99%

Field emitter electrostatics: a review with special emphasis on modern high-precision finite-element modelling

Assis

Dall’Agnol

Forbes

2022

J. Phys.: Condens. Matter

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This review of the quantitative electrostatics of ﬁeld emitters, covering analytical, numerical and “ﬁtted formula” approaches, is thought to be the ﬁrst of its kind in the 100 years of the subject. The review relates chieﬂy to situations where emitters operate in an electronically ideal manner, and zero-current electrostatics is applicable. Terminology is carefully described and is “polarity independent”, so the review applies to both ﬁeld electron and ﬁeld ion emitters. It also applies more generally to charged, pointed electron-conductors—which exhibit the “electrostatic lightning-rod eﬀect”, but are poorly discussed in general electricity and magnetism literature. Modern electron-conductor electrostatics is an application of the chemical thermodynamics and statistical mechanics of electrons. In related theory, the primary role of classical electrostatic potentials (rather than ﬁelds) becomes apparent. Space and time limitations have meant the review cannot be comprehensive in both detail and scope. Rather, it focuses chieﬂy on the electrostatics of two common basic emitter forms: the needle-shaped emitters used in traditional projection technologies; and the post-shaped emitters often used in modelling large-area multi-emitter electron sources. In the post-on-plane context, we consider in detail both the electrostatics of the single post and the interaction between two identical posts that occurs as a result of electrostatic depolarization (often called “screening” or “shielding”). Core to the review are discussions of the “minimum domain dimensions” method for implementing eﬀective ﬁnite-element-method electrostatic simulations, and of the variant that leads to very precise estimates of dimensionless ﬁeld enhancement factors (error typically less than 0.001 % in simple situations where analytical comparisons exist). Brief outline discussions, and some core references, are given for each of many “related considerations” relevant to the electrostatic situations, methods and results described. Many areas of ﬁeld emitter electrostatics are suggested where further research and/or separate mini-reviews would probably be useful.

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“…(*5) In both FE and FI emission, investigating subatomic level and bond-level emission properties, where these can be now be observed experimentally (e.g., [138][139][140][141]).…”

Section: F Atomistic Electrostatic Modellingmentioning

confidence: 99%

Field emitter electrostatics: a review with special emphasis on modern high-precision finite-element modelling

Assis¹,

Dall’Agnol²,

Forbes³

2022

Preprint

View full text Add to dashboard Cite

This review of the quantitative electrostatics of field emitters, covering analytical, numerical and "fitted formula" approaches, is thought the first of its kind in the 100 years of the subject. The review relates chiefly to situations where emitters operate in an electronically ideal manner, and zero-current electrostatics is applicable. Terminology is carefully described and is "polarity independent", so that the review applies to both field electron and field ion emitters. It also applies more generally to charged, pointed electron-conductors-which exhibit the "electrostatic lightning-rod effect", but are poorly discussed in general electricity and magnetism literature. Modern electron-conductor electrostatics is an application of the chemical thermodynamics and statistical mechanics of electrons. In related theory, the primary role of classical electrostatic potentials (rather than fields) becomes apparent. Space and time limitations have meant that the review cannot be comprehensive in both detail and scope. Rather, it focuses chiefly on the electrostatics of two common basic emitter forms: the needle-shaped emitters used in traditional projection technologies; and the post-shaped emitters often used in modelling large-area multi-emitter electron sources. In the post-on-plane context, we consider in detail both the electrostatics of the single post and the interaction between two identical posts that occurs as a result of electrostatic depolarization (often called "screening" or "shielding"). Core to the review are discussions of the "minimum domain dimensions" method for implementing effective finite-element-method electrostatic simulations, and of the variant of this that leads to very precise estimates of dimensionless field enhancement factors (error typically less than 0.001 % in simple situations where analytical comparisons exist). Brief outline discussions, and some core references, are given for each of many "related considerations" that are relevant to the electrostatic situations, methods and results described. Many areas of field emitter electrostatics are suggested where further research and/or separate mini-reviews would probably be useful.

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Field emission microscope for a single fullerene molecule

Cited by 6 publications

References 45 publications

Subnanometeric optical modulation of a single-molecule electron source

Subnanometeric optical modulation of a single-molecule electron source

Field emitter electrostatics: a review with special emphasis on modern high-precision finite-element modelling

Field emitter electrostatics: a review with special emphasis on modern high-precision finite-element modelling

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