Nanometer rotor device driven by directional flow

Abstract

A nano rotor device driven by directional flow is characterized by comprising a rotor and a heterogeneous nanotube formed by splicing a spiral graphene nanobelt and a spiral boron nitride nanobelt with the same pipe diameter, and a heterojunction is formed at the splicing position; the stators are formed by nanotubes with larger tube diameters and shorter lengths, are respectively fixed at two ends of the heterogeneous nanotubes, and are used for limiting the axial movement of the heterogeneous nanotubes; and the driving sources are connected to the two ends of the heterogeneous nanotubes respectively and used for driving the heterogeneous nanotubes to rotate through fluid in a flow field. A flow field is generated through pressure difference, and axial rotation of the nanotube is achieved. The nano tube is formed by splicing a boron nitride band and a graphene band which are of a spiral structure in the chiral spiral direction, the nano tube is driven to rotate by utilizing a potential barrier at the junction of the boron nitride band and the graphene band under the action of a directional flow, the rotating speed can be accurately controlled through the flow speed of the directional flow, and a higher rotating speed (about 100 revolutions per second) can be realized at a lower flow speed (10nm / s).

Description

Technical Field

[0001] The present invention relates to the technical field of nano rotors, in particular to a nano rotor device using a directional flowing liquid as a driving source. Background Art

[0002] A nanorotor (rotating motor) is a device that can achieve rotational motion at the nanoscale, and is usually used to convert external energy (such as chemical energy, electrical energy, light energy, etc.) into mechanical rotation. Nanorotors can be precisely manipulated at extremely small scales and exhibit unique properties. They have important applications in nanotechnology, molecular machinery, and biological systems, especially in the fields of nanobearings, molecular transport, and energy conversion. Existing nanorotors can achieve rotation through a variety of external driving mechanisms. For example, electric nanorotors promote rotation by guiding the uneven distribution of charge under the action of a specific electric field; magnetic nanorotors achieve rotation by using external magnetic field forces; and light-driven motors stimulate material response and rotation through laser irradiation or light beams. In addition, chemical-driven motors rely on specific chemical reactions to drive motion through energy transfer between molecules. These different types of driving mechanisms give nanorotating motors different advantages in specific applications.

[0003] Although the research on nano rotary motors has made certain progress, the current technology still faces many challenges and limitations. For example, existing rotary motors are usually difficult to achieve continuous, stable, and controllable directional rotation, that is, the rotation direction and speed of the motor are often difficult to accurately control, and the rotation cycle is short. These problems limit the practicality of the existing technology in practical applications, especially in tasks that require long-term and precise control. Patent document CN115912992A discloses a closed nanochannel formed by splicing boron nitride tubes and carbon nanotubes, which uses waste heat to generate continuous flow in an annular channel to achieve nano power generation, but the annular flow requires a large temperature difference (>100K) to drive, and the flow rate is relatively low. Summary of the invention

[0004] In view of the deficiencies of the above-mentioned prior art, the present invention proposes a nano-rotor device driven by a directional flow field, which uses an external fluid field as a driving source, and achieves precise control of the motor speed and rotation direction by regulating the speed and direction of the flow field. Unlike traditional driving methods, as long as the flow field exists, the motor can maintain continuous rotation, thus solving the shortcomings of existing motors in terms of sustainability and stability. Further, nanotubes made of helical boron nitride ribbons and graphene ribbons spliced ​​along the chiral helical direction are used. This design not only provides a longer rotation cycle, but also has more flexible controllability. It can be widely used in molecular manipulation, microfluidic systems and nano-scale automation equipment, greatly expanding the application prospects of nano-rotary motors.

[0005] The present invention is specifically implemented through the following technical solutions:

[0006] A nano-rotor device driven by a directional flow is characterized by comprising:

[0007] The rotor is a heterogeneous nanotube composed of a splicing of a spiral graphene nanoribbon and a spiral boron nitride nanoribbon of the same diameter, and a heterojunction is formed at the splicing point;

[0008] A stator, composed of a nanotube with a larger diameter and a shorter length, is respectively fixed to both ends of the heterogeneous nanotube to limit the axial movement of the heterogeneous nanotube;

[0009] The driving sources are respectively connected to the two ends of the heterogeneous nanotubes to drive the heterogeneous nanotubes to rotate through the fluid in the flow field.

[0010] Furthermore, the diameter of the heterogeneous nanotubes ranges from 2.5 to 20 nanometers, and the total length ranges from 10 to 100 nanometers.

[0011] Furthermore, the driving source is composed of at least two water tanks and a pressure valve, and a directional flow is generated in the rotor by adjusting the pressure valve.

[0012] Furthermore, the driving source forms a directional flow from left to right inside the rotor through the pressure difference applied to the pressure valve.

[0013] Furthermore, a driving method is also included, the method comprising the following steps:

[0014] S1. Connect the two ends of the heterogeneous nanotube to a water source, and press the water flow from one end to the other end, so that the water flow continues to flow in the heterogeneous nanotube;

[0015] S2. When the directional flow passes through the interface between carbon and boron nitride, water molecules produce different van der Waals interactions with the carbon and boron nitride surfaces, thereby forming a potential barrier at the interface; after the water molecules collide with the potential barrier, they exert radial force on the heterogeneous nanotubes, thereby driving the heterogeneous nanotubes to produce directional rotation around their circular axes.

[0016] S3: Two stators restrict the axial movement of the heterojunction nanotubes.

[0017] Furthermore, the basic elements of the device body can be synthesized in the laboratory by hot wire chemical vapor deposition or laser vaporization.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The speed of the device can be controlled by the liquid flow rate. The relationship between the speed and the flow rate is: Where α is the helical angle of the graphene ribbon, h is the height of the boron nitride helical ribbon, d is the tube diameter, and X and Y are the friction terms respectively; that is, the rotation speed of the rotor can be accurately adjusted according to the flow velocity of the flow field.

[0020] 2. Compared with patent CN115912992A, the present invention realizes the axial rotation of nanotubes by generating flow field through pressure difference. Nanotubes are spliced ​​by helical boron nitride ribbons and graphene ribbons along the chiral helical direction. The potential barrier at the junction of the boron nitride ribbon and the graphene ribbon is used to drive the nanotubes to rotate under the action of directional flow. The rotation speed can be precisely controlled by the flow velocity of the directional flow, and a smaller flow velocity (10nm / s) can achieve a higher rotation speed (~100 rpm), which is particularly suitable for the field of nano bearings or nano motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a nano-rotor device driven by a directional flow according to the present invention.

[0022] Figure 2 The nanotube rotation angle changes with time

[0023] Figure 3 The nanotube rotation angle changes with time

[0024] Figure 4 The expansion diagram of the heterogeneous nanotube along the axis

[0025] In the figure: 1. Helical graphene nanoribbon; 2. Helical boron nitride nanoribbon; 3. Fixed tube; 4. Water or other liquid; 5. Reservoir; 6. Pressure valve. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments, but this should not limit the protection scope of the present invention.

[0027] The present invention provides a nano-rotor device driven by directional flow, comprising a device body, the core element of which is a heterogeneous nanotube composed of spiral graphene nanoribbons and spiral boron nitride nanoribbons. The heterogeneous nanotube serves as a rotor, with both ends connected to a flow field to receive fluid drive and generate rotation.

[0028] Rotor: It is composed of helical boron nitride ribbon and graphene ribbon along the chirality (such as Figure 2 The rotor in this embodiment has a diameter range of 2.5 to 20 nanometers and a total length range of 10 to 100 nanometers. The spiral graphene nanoribbons and spiral boron nitride nanoribbons can be synthesized in the laboratory by hot wire chemical vapor deposition or laser vaporization. These methods ensure the high quality and purity of the nanoribbons, thereby ensuring the stability and performance of the rotor.

[0029] Stator: It is composed of two nanotubes 3 with larger diameter and shorter length. Its function is to limit the translational motion of the rotor and ensure that the rotor can stably rotate around its axis when driven by the fluid.

[0030] Driving source: It is composed of water tanks 4, 5 and pressure valve 6. By adjusting the pressure difference generated by the pressure valve 6, a directional flow from left to right is formed inside the rotor.

[0031] The specific implementation steps of the present invention are as follows:

[0032] S1: Fix the two ends of the rotor in the stator and connect the two ends to the driving source. The pressure difference applied to the pressure valve 6 forms a directional flow from left to right inside the rotor;

[0033] S2: When the directional flow passes through the interface barrier between the graphene ribbon and the boron nitride ribbon, the water molecules collide with the barrier, generating a radial force, which in turn drives the heterojunction nanotube to rotate in the clockwise direction (from the perspective of the left reservoir to the right reservoir).

[0034] The working principle of the present invention is that due to the different van der Waals interactions between water molecules and carbon atoms and boron nitride atoms, there is a potential barrier between the graphene ribbon and the boron nitride ribbon. When the water molecules collide with the potential barrier, the heterojunction will be subjected to radial force. At the same time, the stator limits the translation of the rotor, so the radial force drives the heterojunction to produce a directional rotation around its circular axis. As long as the water flow continues, the device can drive the heterojunction nanotube to achieve continuous directional rotation. The device can be used as a rotating component such as a bearing or rotor in a nanorobot, such as Figure 4 shown.

[0035] The invention can be used as rotating parts such as bearings or rotors in nanorobots, and provides a new solution for driving and controlling nanoscale devices.

[0036] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A nanorotor device driven by a directional flow, characterized in that: include: The rotor is a heterogeneous nanotube composed of a splicing of a spiral graphene nanoribbon and a spiral boron nitride nanoribbon of the same diameter, and a heterojunction is formed at the splicing point; A stator, composed of a nanotube with a larger diameter and a shorter length, is respectively fixed to both ends of the heterogeneous nanotube to limit the axial movement of the heterogeneous nanotube; The driving sources are respectively connected to the two ends of the heterogeneous nanotubes to drive the heterogeneous nanotubes to rotate through the fluid in the flow field.

2. The nano-rotor device driven by directional flow according to claim 1, characterized in that: The diameter of the heterogeneous nanotubes ranges from 2.5 to 20 nanometers, and the total length ranges from 10 to 100 nanometers.

3. The nano-rotor device driven by directional flow according to claim 1, characterized in that: The driving source is composed of at least two water tanks and a pressure valve, and a directional flow is generated in the rotor by adjusting the pressure valve.

4. The nano-rotor device driven by directional flow according to claim 3, characterized in that: The driving source forms a directional flow from left to right inside the rotor through the pressure difference applied to the pressure valve.

5. The nano-rotor device driven by directional flow according to claims 1-4, characterized in that: Also included is a driving method, the method comprising the following steps: S1. Connect the two ends of the heterogeneous nanotube to a water source, and press the water flow from one end to the other end, so that the water flow continues to flow in the heterogeneous nanotube; S2. When the directional flow passes through the interface between carbon and boron nitride, water molecules produce different van der Waals interactions with the carbon and boron nitride surfaces, thereby forming a potential barrier at the interface; after the water molecules collide with the potential barrier, they exert radial force on the heterogeneous nanotubes, thereby driving the heterogeneous nanotubes to produce directional rotation around their circular axes. S3: Two stators restrict the axial movement of the heterojunction nanotubes.

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