Research On The Energy Field Characteristics Of Light-induced Micro-zone For Nano-device Manufacturing

With the development of nanotechnology,nanodevices have important prospects in the fields of energy storage,sensing and medicine due to their miniaturisation,high integration and multifunctionality.Due to their incomparable physical and chemical characteristics,nanomaterials can exhibit properties that are difficult to achieve with macroscopic materials in tiny regions of the energy field under light induction.Lightinduced energy fields are divided into two main categories by scale: near-field energy fields and far-field energy fields.The far-field refers to the study of the properties and applications of light in a macroscopic sense.The near-field energy field is relative to the far-field energy field,which focuses on the physical phenomena of light at the nanoscale,and the main problem it faces is to break the limits of diffraction.In order to explore the unique properties of nanodevices in the near-field and far-field energy fields,this paper investigates the properties of different nanomaterials in the near-field and far-field energy fields from both theoretical and experimental aspects,and explores the advantages of different energy fields in the application of nanotechnology.In order to gain a deeper understanding of the properties of light-induced micro-zone energy fields and to explore the unique properties of nanomaterials in the near-field and far-field energy fields,the basic principles of near-field and far-field micro-zone energy fields have been investigated respectively.A nanofabrication platform based on microzone energy fields has been developed,which offers the advantages of real-time online observation,efficient nanomanipulation,precise position positioning and performance inspection.In order to study the forces on nanomaterials in the light-induced micro-zone energy field,a modelling analysis of the forces on nanomaterials in the light-induced micro-zone energy field is firstly carried out to obtain the forces on nanoparticles in the light-induced micro-zone energy field.Then,the near-field micro-zone energy field manipulation of nanoparticles is simulated using Comsol multi-field simulation software,and the energy field distribution of the near-field micro-zone energy field manipulation of nanoparticles is obtained,and the melting of nanoparticles is carried out using the near-field micro-zone energy field.Finally,a theoretical analysis of the forces on carbon nanotubes in the farfield micro-zone energy field is carried out,and it is concluded that carbon nanotubes are subject to both electromagnetic forces and optical pressure in the far-field micro-zone energy field.The process of the action of the far-field micro-zone energy field on the carbon nanotubes is simulated,and the distribution maps of the electromagnetic,temperature and stress fields of the carbon nanotubes are derived,and the effect of energy fields of different powers on the bending degree of the carbon nanotubes is investigated.Experiments on the driving of the far-field micro-zone energy field on carbon nanotubes are successfully carried out using the nanofabrication platform,and it is calculated that the force of the far-field energy field on carbon nanotubes is at the n N level.This lightinduced energy field-based nano-manipulation has the advantage of being real-time,noncontact and non-destructive,and offers a new approach for future nano-manipulation.In order to investigate the response characteristics of light-induced micro-zone energy field-based nanodevices,nanoparticle manipulation experiments and threedimensional manipulation of silver nanoparticles are firstly carried out,and experiments on the three-dimensional construction of carbon nanotube-silver nanoparticle structures are completed.The carbon nanotube-silver nanoparticle structure is fabricated and tested for optoelectronic properties,and the results show that the nanoparticle-carbon nanotube device have a good UV photoelectric response.A graphene-based nanodevice with a photothermal response is then fabricated using a fully dry viscoelastic embossing method,which can be easily and effectively used for light absorption,photoresponse and thermal absorption studies.The study of the photothermal response properties of graphene nanodevices in micro-zone energy fields has revealed that the devices have a fast and sensitive response to near-infrared wavelengths and high temperature detection.The study of such nanodevices could provide an experimental basis for the design and fabrication,and provide an effective guide for the application of graphene and other twodimensional materials in the electronic component and the solar cell field.To solve the problem of random distribution of the near field formed by the Gaussian energy field irradiated probes in experiments with unilateral energy field irradiated nanoparticles,a novel concept of annular energy field is proposed and the advantages of the annular energy field are explained theoretically.A comparative study between the unilateral and annular energy fields using finite element simulations shows that the field strength of the annular energy field is 10 times higher than that of the unilateral field under the same conditions.The effect of each parameter on the annular energy field is investigated and it is found that the near-field enhanced field strength increased with higher wavelength frequency,larger irradiation area and closer irradiation distance.By studying the field effect of near-field enhancement,it is found that the expansion and deformation of the tip of the needle is greatest when the wavelength of the irradiated light is 400 nm.The theoretical and simulation analysis suggest that the annular energy field has the characteristics of larger irradiation area and more uniform near-field distribution than unilateral energy field irradiation,which provides a new method for the next step to better utilize the light-induced micro-zone energy field for nano-manipulation and nanodevice preparation.