In-situ control of on-chip angstrom gaps, atomic switches, and molecular junctions by light irradiation

Zhang, Surong; Guo, Chenyang; Ni, Lifa; Hans, Kerstin M.-C.; Zhang, Weiqiang; Peng, Siqing; Zhao, Zhikai; Guhr, Daniel C.; Qi, Zhihua; Liu, Haitao; Song, Mingjun; Wang, Qingling; Boneberg, Johannes; Guo, Xuefeng; Lee, Takhee; Scheer, Elke; Dong, Xiaopeng

doi:10.1016/j.nantod.2021.101226

Cited by 19 publications

(18 citation statements)

References 44 publications

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“…Multiple surface effects due to optical irradiation have been reported that could influence the Δ G profile. They are the thermal atomic expansion of the electrode, 80 that can result in a size variation of the nanogap on the sub-Å scale, 81 and the creation of picocavities at RT. 82 The effects of the nearfield over the Au electrodes’ surface on our experiment is essentially avoided since the laser irradiation is activated prior to definition and stabilization of the interelectrode nanogap.…”

Section: Resultsmentioning

confidence: 99%

Playing catch and release with single molecules: mechanistic insights into plasmon-controlled nanogaps

Domke

Aragonès

2023

Nanoscale

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Section: Resultsmentioning

confidence: 99%

Playing catch and release with single molecules: mechanistic insights into plasmon-controlled nanogaps

Domke

Aragonès

2023

Nanoscale

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“…[83] Therefore, just like constructing the basis of computing by controlling the voltage of transistors, scientists can control the state of liquid metal by changing the external environment, and take its conductivity difference in different states as a controllable computing logic unit. [84] Further, EGaIn is widely used in coolants and thermal interface materials due to its high thermal conductivity (ten times larger than that of water). [85][86][87] As shown in Figure 3b, when the EGaIn microdroplets are dispersed in a silicone elastomer to form a liquid metal embedded elastomer (LMEE) composite material, the function of rapid cooling was achieved.…”

Section: Electrical and Thermal Conductivitymentioning

confidence: 99%

“…So far, the mature methods to measure the characteristics of molecular junctions include mechanically controllable break junctions (MCBJ), [84,176,177] scanning tunneling microscope break junctions (STM-BJ), [178,179] EGaIn-based molecular tunneling junctions (MTJs), [180,181] to name a few. [161,182] Currently, the most common way of incorporating EGaIn in ME devices is to measure the current-voltage characteristics of a molecular layer by either constructing a cone-shaped EGaIn tip or by using microfluidic channels filled with EGaIn as a top electrode to complete the MTJ.…”

Section: Top Electrode For Molecular Electronicsmentioning

confidence: 99%

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Smart Eutectic Gallium–Indium: From Properties to Applications

et al. 2022

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Eutectic gallium–indium (EGaIn), a liquid metal with a melting point close to or below room temperature, has attracted extensive attention in recent years due to its excellent properties such as fluidity, high conductivity, thermal conductivity, stretchability, self‐healing capability, biocompatibility, and recyclability. These features of EGaIn can be adjusted by changing the experimental condition, and various composite materials with extended properties can be further obtained by mixing EGaIn with other materials. In this review, not only the are unique properties of EGaIn introduced, but also the working principles for the EGaIn‐based devices are illustrated and the developments of EGaIn‐related techniques are summarized. The applications of EGaIn in various fields, such as flexible electronics (sensors, antennas, electronic circuits), molecular electronics (molecular memory, opto‐electronic switches, or reconfigurable junctions), energy catalysis (heat management, motors, generators, batteries), biomedical science (drug delivery, tumor therapy, bioimaging and neural interfaces) are reviewed. Finally, a critical discussion of the main challenges for the development of EGaIn‐based techniques are discussed, and the potential applications in new fields are prospected.

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“…

devices that employ external stimuli (e.g., chemical, light, magnetic, or electric field) to modulate electron transport through molecular junctions. [2,3,5,7,11,[13][14][15][16][17][18][19][20][21] The modulations typically rely on stimulusinduced changes in molecular electronic states [5,14,22] and therefore the functional diversity and signal stability of molecular devices depend on the availability of different stable electronic states and efficient conversions between them. [2,3,7,23] As allelectrical-driven devices, three-terminal solid-state single-electron transistors (SETs) [17,[24][25][26][27][28][29][30] not only reflect the quantum behavior of intramolecular electron transport, such as Coulomb blockade, [19,20,31,32] Zeeman effect, [20,21] thermoelectric properties [25,26,33] and Kondo effect, [21,[34][35][36] but also have the unique advantage of controlling the molecular orbitals (MOs) by applying external electrostatic potentials,

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mentioning

confidence: 99%

Stable Universal 1‐ and 2‐Input Single‐Molecule Logic Gates

et al. 2022

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Controllable single‐molecule logic operations will enable development of reliable ultra‐minimalistic circuit elements for high‐density computing but require stable currents from multiple orthogonal inputs in molecular junctions. Utilizing the two unique adjacent conductive molecular orbitals (MOs) of gated Au/S‐(CH2)3‐Fc‐(CH2)9‐S/Au (Fc = ferrocene) single‐electron transistors (≈2 nm), a stable single‐electron logic calculator (SELC) is presented, which allows real‐time modulation of output current as a function of orthogonal input bias (Vb) and gate (Vg) voltages. Reliable and low‐voltage (ǀVbǀ ≤ 80 mV, ǀVgǀ ≤ 2 V) operations of the SELC depend upon the unambiguous association of current resonances with energy shifts of the MOs (which show an invariable, small energy separation of ≈100 meV) in response to the changes of voltages, which is confirmed by electron‐transport calculations. Stable multi‐logic operations based on the SELC modulated current conversions between the two resonances and Coulomb blockade regimes are demonstrated via the implementation of all universal 1‐input (YES/NOT/PASS_1/PASS_0) and 2‐input (AND/XOR/OR/NAND/NOR/INT/XNOR) logic gates.

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In-situ control of on-chip angstrom gaps, atomic switches, and molecular junctions by light irradiation

Cited by 19 publications

References 44 publications

Playing catch and release with single molecules: mechanistic insights into plasmon-controlled nanogaps

Playing catch and release with single molecules: mechanistic insights into plasmon-controlled nanogaps

Smart Eutectic Gallium–Indium: From Properties to Applications

Stable Universal 1‐ and 2‐Input Single‐Molecule Logic Gates

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