Ultrasonic Spray Coating Machine for Graphene Quantum Dots

Ultrasonic Spray Coating Machine for Graphene Quantum Dots

Graphene quantum dots are a novel zero-dimensional carbon nanomaterial. As a derivative of graphene, they possess both the excellent properties of graphene and quantum confinement and boundary effects. They appear as a uniformly dispersed liquid or powder, ranging in color from pale yellow to dark brown, and are core supporting materials in high-end fields such as optics, electronics, and biomedicine. Their purity can reach over 99.5%, with particle sizes concentrated between 2-10 nm. They can be prepared using hydrothermal methods, microwave methods, and oxidation cutting methods. Citric acid, glucose, or graphite oxide are commonly used as carbon sources. Their surfaces are rich in active functional groups, exhibiting good water solubility, stable fluorescence, and the absence of toxic metal elements. They are resistant to acids and alkalis, and photobleaching. The emission wavelength can be tunable by adjusting the preparation conditions, making them suitable for various high-end precision coating and device fabrication needs.

Although graphene quantum dots exhibit superior performance and have wide applications, their ultra-small particle size, high surface energy, and unique crystal structure limit the achievement of high-quality films using traditional spraying processes. The extremely high surface energy of graphene quantum dots makes them prone to aggregation due to strong van der Waals forces. This not only disrupts their quantum confinement effect, leading to reduced fluorescence quantum yield and decreased photoelectric performance, but also introduces defects such as porosity, uneven thickness, and surface roughness into the coating. Furthermore, their fragile structure makes them highly susceptible to damage from the high-pressure impact and mechanical shearing forces of traditional pneumatic spraying and spin coating processes. These processes also easily cause inter-pixel chemical contamination and optical crosstalk, affecting the overall coating performance. In addition, traditional processes suffer from uneven atomization and significant material loss. Even with small amounts of graphene quantum dots, substantial waste increases costs for companies. Poor coating thickness consistency fails to meet the stringent coating standards of high-end optical displays and precision sensing, severely restricting their industrialization and large-scale application.

cheersonic ultrasonic spraying machine is specifically designed for the material properties of graphene quantum dots, offering a customized precision spraying process that completely solves the various pain points of traditional processes. The equipment utilizes a 25kHz-180kHz high-frequency ultrasonic atomization principle, converting electrical energy into high-frequency mechanical vibration through a piezoelectric transducer. This uniformly atomizes the graphene quantum dot dispersion into micron-sized droplets. The entire process involves low-pressure, gentle atomization, resulting in extremely low droplet kinetic energy, eliminating high-pressure impacts and mechanical shearing. This maximizes the protection of the graphene quantum dot’s intact structure and surface functional groups, preventing structural damage and fluorescence performance degradation, while effectively inhibiting particle aggregation. High-frequency atomization effectively disperses agglomerated particles, ensuring uniform distribution of quantum dots in the sprayed droplets, reducing contamination and crosstalk during the spraying process, and fundamentally solving defects such as coating porosity and uneven thickness, fully releasing its core optoelectronic, fluorescent, and sensing advantages.

Compared to traditional spraying processes, cheersonic ultrasonic spraying equipment offers significant advantages. The equipment boasts high atomization uniformity, with coating thickness uniformity consistently within a 5% deviation. It enables the fabrication of nanoscale ultrathin continuous films, producing dense, pinhole-free, and crack-free coatings that effectively preserve the intrinsic superior properties of graphene quantum dots, meeting the stringent performance requirements of high-end products. The non-contact directional deposition spraying method achieves a graphene quantum dot utilization rate exceeding 90%, a significant improvement over traditional spin coating processes, greatly reducing raw material costs for enterprises and aligning with green production principles. It is particularly suitable for the mass production of such high-cost nanomaterials. The equipment exhibits strong compatibility, adapting to dispersions in various solvent systems, including aqueous and organic phases, and various substrates such as silicon wafers, metals, flexible films, and medical polymers. It can achieve both large-area uniform spraying and small-area precision spraying, meeting the needs of both laboratory research and industrial mass production.

In practical applications, graphene quantum dot films prepared by the cheersonic ultrasonic spraying machine exhibit stable performance and good repeatability, making them widely applicable in various high-end fields. In the field of optical display, graphene quantum dots can be used to fabricate microdisplay devices, improving display resolution and luminescence stability while solving pixel crosstalk problems. In the field of sensing and detection, they can be used to fabricate gas sensors and biosensors, leveraging their high sensitivity and surface functional group advantages to achieve precise detection. In the biomedical field, they can be used as fluorescent probes and targeted drug carriers, achieving precise imaging and sustained drug release thanks to their excellent biocompatibility and fluorescence properties. In the field of flexible electronics, they can be used in flexible displays and flexible sensor electrode coatings, adapting to folding and bending scenarios and promoting the lightweighting and portability of devices.

Today, with the continuous iteration of optical display, sensing and detection, and flexible electronics technologies, the market applications of graphene quantum dots are becoming increasingly widespread, constantly raising the requirements for the precision and stability of spraying processes. Cheersonic Ultrasonic Equipment Co., Ltd. has been deeply involved in the field of nano-spraying for many years, focusing on solving the precision film formation challenges of various high-end nanomaterials. Relying on mature equipment technology and a complete process system, it provides efficient, stable, and cost-effective complete solutions for graphene quantum dot film preparation, helping various related enterprises achieve technological upgrades and mass production.

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

Chinese Website: Cheersonic Provides Professional Coating Solutions