Apparatus for preparing single-molecule sample by supersonic wave

Abstract

The invention relates to the single-molecule research device field, an apparatus for single-molecule sample comprises an ultrasonic vibration system, a vacuum cavity, a vacuum control rod, a substrate, CCD and direct-current power supply. The ultrasonic vibration system is composed of a supersonic generator, a stepping motor, a magnetic induced shrinkage or elongation energy transducer and a sample container. The stepping motor, the magnetic induced shrinkage or elongation energy transducer and the sample container are subjected to flange connection in order and arranged in the vacuum cavity, the substrate is positioned at the lower part of the sample container, and the vacuum control rod is connected to the substrate. The novel method for preparing the single-molecule sample uses a supersonic wave principle to obtain the samples which adsorb on the substrate by single-molecule mode, the surface flatness of the substrate can not be destroyed, and the experimental requirement under a scanning tunnel microscope can be satisfied.

Description

technical field [0001] The invention relates to the field of single-molecule research equipment, and is applied to the single-molecule sample preparation process in ultra-high vacuum scanning tunneling microscope experiments, in particular to a device for preparing single-molecule samples by ultrasonic waves, which provides a new method for preparing single-molecule samples, which can make Powder samples are studied by adsorbing to the substrate surface in the form of single molecules. Background technique [0002] The ultra-high vacuum scanning tunneling microscope is a high-precision instrument used for the study of single molecules. When studying single molecules, it is necessary to adsorb the molecules to be studied on a flat substrate surface in a dispersed form, that is, to prepare single molecule samples. It is then probed and studied with an extremely thin needle tip. The substrate is made of gold, silicon, etc., and has an area of ​​10mm×5mm. [0003] At present, ...

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Problems solved by technology

However, the above methods have limitations. For specific samples, such as NC dissolved in toluene solution 60 Molecules, which will decompose at high temperature, are not suitable for evaporation. Soaking in the solution will cause the substrate to absorb a large number of toluene molecules and reduce the flatness of the substrate, making it impossible to conduct research. The contact method can only obtain molecular clusters, but cannot obtain single Molecules Adsorbed by Molecular Form

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