Method for unfastening and managing nanometer threads and application thereof

A nanowire and cleavage technology, applied in the field of cleavage nanowires, can solve the problems of uncontrollable cleavage position, uncontrollable length of resonant cavity, etc., and achieve the effect of simple method and wide application prospect

Inactive Publication Date: 2009-04-15
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the naturally grown flat end face as the reflective surface will greatly limit the available materials and material preparation methods, and the position of the cleavage cannot be controlled by ultrasonic waves, so the length of the resonant cavity cannot be controlled

Method used

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  • Method for unfastening and managing nanometer threads and application thereof
  • Method for unfastening and managing nanometer threads and application thereof
  • Method for unfastening and managing nanometer threads and application thereof

Examples

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Embodiment Construction

[0021] Concrete steps of the present invention are as follows:

[0022] First complete the preparatory work, as follows:

[0023] Prepare cadmium sulfide nanowires by chemical synthesis; disperse cadmium sulfide nanowires: pour a small amount of cadmium sulfide nanowires into alcohol and make a suspension, ultrasonically treat the suspension for 2-10 minutes, and drop the treated suspension into onto a clean substrate such as silicon; nanowires dispersed on the substrate can be obtained after the alcohol has evaporated. Here, if further observation with a transmission electron microscope is required, it can be directly dropped on the carbon support film.

[0024] Then immerse one end of the tungsten wire with a diameter of 0.2-1 mm in NaOH solution with a concentration of 5 moles per liter and corrode it until the tip of the tungsten wire forms a needle tip with a radius of curvature less than 100 nanometers. The radius of the needle tip can be observed with a scanning electr...

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Abstract

The process of cleaving nanometer line includes the following steps: setting the nanometer line on clean substrate and setting the substrate with nanometer line into sample chamber of scanning electronic microscope with nanometer probe operation system; mounting cleaving needle tip in the nanometer probe operation system; vacuum pumping the sample chamber to required vacuum degree and turning on the electron beam and electron beam accelerating voltage; moving the sample to find the nanometer line to be cloven and moving the nanometer probe to the nanometer line; regulating the needle tip and the nanometer line relatively and moving the nanometer probe for one great step to apply the nanometer line with one shock force for cleaving. The cloven nanometer line is connected with light source and power supply to constitute nanometer laser. The present invention has simple cleavage process, controllable cleavage position and thus the controllable resonant wavelength of the nanometer laser.

Description

Technical field: [0001] The invention relates to a method and application for cleaving nanowires. Background technique: [0002] Research on nanofabrication and nanodevices is the most important field in nanoscience and technology today. Nano-optical devices and nano-optical devices are not only small in size and low in energy consumption, but also effectively integrate nano-electronic devices and nano-optical devices, and have broad application prospects. It has been reported that zinc oxide nanowires can be used to make ultraviolet nanolasers [M.H.Huang, S.Mao, H.Feick, H.Yan, Y.Wu, H.Kind, E.Weber, R.Russo and P.D.Yang, Science 292, 1897(2001).]. Other experiments have shown that single crystal cadmium sulfide (CdS) nanowires with cleavage planes at both ends can form a Fabry-Perot optical resonator, coupled with optical excitation or electrical excitation can form a nanolaser [X.F.Duan, Y.Huang , R. Agarwaland C.M. Lieber, Nature 421, 241 (2003).]. Two good reflectiv...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B82B3/00
Inventor陈清彭练矛
OwnerPEKING UNIV