Design And Process Of Pt-CNT Swimming Micro-nano Robot Driven By Glucose Catalytic Decomposition

Micro-nano robot is a rapidly developing robot research field.Micro-nano robot has a huge application prospect in the biomedical field of drug delivery,surgery,biosensor and detoxification tools.Driving technology is the primary challenge of micro-nano swimming robot.With the r the size of micro-nano swimming robot reducing,the low-reynolds number environment and Brownian motion will influence their movement.When the driving force reaches the order of magnitude of the viscous force,the micro-nano swimming robot can swimming.Brownian motion of the micro-nano swimming robot will change its motion direction,and the micro-nano swimming robot will swim irregular.it is necessary to formulate an effective swimming strategy and design the corresponding structure of micro-nano swimming robot to break through the restriction of low Reynolds number environment and the influence of Brownian motion.Micro-nano swimming robot can transform chemical energy,electrical/magnetic energy and other energy into mechanical energy.Hydrogen peroxide is usually used for chemical self-drive,which has poor biocompatibility.This paper proposes a high biological compatibility micro-nanorobot,using glucose as fuel,trying to realize the long cycle in the human body.The motion is to realize targeted cancer therapy and lay a solid foundation for human health monitoring.The design process and driving force analysis are calculated,and the Pt-CNT micro/nano robot structure was designed.The template electrochemical method and chemical vapor deposition was used to manufacture Pt-CNT micro/nano robot.Based on stoker's law of viscous force and Newton's second law,the motion model was built.The driving force was calculated from the experimental results.The main research contents of this paper are as follows:(1)The driving mechanism of chemical self-electrophoresis micro-nanorobot and the catalytic decomposition principle of glucose(C6H12O6)were studied.By comparing the catalytic characteristics of the anode and cathode materials of glucose fuel cell,platinum(Pt)and Carbon nanotube(CNT)were selected as the anode and cathode respectively.Micro-nanorobot was connecting Pt and CNT through process design.Due to poor infiltration of Pt and CNT,nickel metal film was added between Pt and CNT.In order to fabricate the designed micro-nano robot,template electrochemical method was used for Pt terminal deposition.Nickel(Ni)film was deposited.In order to deposite iron nanoparticle,chemical vapor deposition method was used for CNT deposition,and electrochemical deposition method.Chemical vapor deposition combined process were used for the manufacturing of Pt and CNT heterostructure.(2)The principle of electrochemical deposition based on template,the three electrode electrochemical deposition system was used.The anodic aluminum oxide(AAO)was used as a template.The magnetron sputtering cathode gold(Au)film was deposited.The direct current deposition to metal nanowires deposited.The chloroplatinic acid(H2PtCl6)and boric acid(H3BO3)platinum nanowires was deposited.The nickel sulfate(NiSO4)and boric acid(H3BO3)Ni thin film was deposited.The seven water ferrous sulfate(FeSO47H2O)and boric acid(H3BO3)were used to deposit iron nanoparticle.The chemical vapor deposition method was used to grow carbon nanotubes.The ethylene(C2H4)was used as carbon source gas,hydrogen as reducing gas,argon as shielding gas.The deposition temperature was set as 750?.Sodium hydroxide(NaOH)was used to dissolve the template.Scanning electron microscope(SEM)was used to analyze the morphology of micro-nano robot.Transmission electron microscope(TEM)was used to characterize it,and EDX was used to analyze the element content of micro-nano robot.(3)The statics force of micro-nano robot was analyzed.The Brownian motion affects the motion of micro-nano robot.Low Reynolds number on the micro-nano robot generate viscous force.The stoke viscous force formula and driving force of the Newton's second law was used to calculate the driving force of micro-nano robot.The microscopic observation system was established to track micro-nanorobot.The iverted microscope and high speed CCD was used to built the system.The image sequences was recorded and analyzed by ImageJ.The driving force of the micro-naorobot was calculated.