磁性渐变超薄结构
By employing a gradient design that incorporates a thin layer of magnetic metal and a thin layer of oxide metal on a substrate, the challenge of releasing and controlling tiny droplets is solved. This achieves stable droplet actuation and release control, avoiding the instability of electromagnetic control. It is suitable for stable control of microfluidic chips and other magnetic beads.
CN116313376BActive Publication Date: 2026-07-17SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2023-02-07
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing technologies, it is difficult to release the control of tiny droplets, especially when using electromagnetic phenomena to drive them, as this can easily affect the energized circuit.
Method used
A magnetic gradient ultrathin structure is designed, comprising a magnetic metal thin layer and an oxide metal thin layer on a substrate, forming a strength section and a gradient section through selective regional oxidation treatment, and using a mechanical structure to achieve stable driving and release control of the droplet.
Benefits of technology
Stable control and de-manipulation of droplets in microfluidic chips have been achieved, avoiding the instability of electromagnetic control and improving the stability and reliability of manipulation.
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Figure CN116313376B_ABST
Abstract
本发明公开了一种磁性渐变超薄结构，包括基底A，所述基底A上设置一层磁性金属薄层B，磁性金属薄层B上设置有氧化金属薄层C，所述氧化金属薄层包括强度部和渐变部，所述强度部的所述氧化金属薄层厚度为h，所述渐变部的所述金属氧化薄层厚度由h逐渐变薄，直至趋于0。本发明提供了一种渐变磁性的超薄结构，通过强度部和渐变部的设计，在微流控芯片的应用中，利用强度部，能够有效驱动包裹着磁珠的液滴按照设计的路线进行驱动，而利用渐变部，能够在需要液滴停止时，助力于实现液滴的自动解除，并且由于其强度部与渐变部自然过渡，有利于实现液滴解除控制后，又逆向重新实现液滴控制。使得微流控控制能够有效实现稳定的控制和操作。
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