公开(公告)号：US20250115483A1

公开(公告)日：2025-04-10

申请号：US18982794

申请日：2024-12-16

Applicant: Guangdong University of Technology

Inventor： Yun CHEN ,  Bin XIE ,  Yuanhui GUO ,  Hao ZHANG ,  Maoxiang HOU ,  Li MA ,  Xin CHEN

IPC: G01N27/12 ,  B23K26/362 ,  C01B32/184

Abstract: A method for manufacturing a humidity alarm device based on laser-induced graphene is performed as follows. Carbon-based films are coated with a hydroxide ion-containing solution and processed by a laser device to generate hydrophilic graphene layers. The hydrophilic graphene layers are peeled off from the carbon-based films, wetted, and respectively wrapped around shaping rods varying in diameter. The wrapped rods are heated and shaped by a drying oven to obtain curled graphene switches. Each curled graphene switch is connected in series with an alarm lamp to form an alarm component. The alarm components are connected in parallel, and then connected to a positive terminal and a negative terminal of a power supply to form the humidity alarm device.

公开(公告)号：US20230048134A1

公开(公告)日：2023-02-16

申请号：US17968960

申请日：2022-10-19

Applicant: Guangdong University of Technology

Inventor： Yun CHEN ,  Yuanhui GUO ,  Bin XIE ,  Lu YAN ,  Maoxiang HOU ,  Xin CHEN

IPC: B01J20/02 ,  B01J20/20 ,  B01J20/30 ,  B01J20/32 ,  B01J20/28 ,  C23C14/35 ,  C23C14/02 ,  C23C14/18 ,  C23C14/08

Abstract: A method of fabricating a magnetically-controlled graphene-based micro-/nano-motor includes: (a) mixing FeCl3 crystal powder with deionized water to obtain a FeCl3 solution; (b) completely immersing a carbon-based microsphere in the FeCl3 solution; transferring the carbon-based microsphere from the FeCl3 solution followed by heating to allow crystallization of FeCl3 on the surface of the carbon-based microsphere to obtain a FeCl3-carbon-based microsphere; (c) heating the FeCl3-carbon-based microsphere in a vacuum chamber until there is no moisture in the vacuum chamber; continuously removing gas in the vacuum chamber and introducing oxygen; and treating the FeCl3-carbon-based microsphere with a laser in an oxygen-enriched environment to obtain the magnetically controlled graphene-based micro-/nano-motor. A magnetically-controlled graphene-based micro-/nano-motor is further provided.