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相关概念视频

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...
Physical Methods for Controlling Microbial Growth: Temperature01:23

Physical Methods for Controlling Microbial Growth: Temperature

Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...

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相关实验视频

Updated: May 19, 2026

Fabrication of 3D Carbon Microelectromechanical Systems C-MEMS
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Published on: June 17, 2017

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在室温3D碳微印刷.

Fernand E Torres-Davila1,2, Katerina L Chagoya3, Emma E Blanco4

  • 1NanoScience Technology Center, University of Central Florida, Orlando, FL, USA.

Nature communications
|March 30, 2024
PubMed
概括

研究人员使用可见光和无金属催化剂开发了环保的3D碳印刷. 这种方法可以快速创建高比例碳微结构,用于先进的应用.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 传统的3D碳材料合成是能源密集型和基板有限的.
  • 复杂的3D碳结构需要可扩展,环保的方法.
  • 在有图案的碳材料中实现超高的尺寸比仍然是一个挑战.

研究的目的:

  • 为了展示一个简单的,室温3D打印工艺,用于碳功能材料.
  • 开发一种环保和可扩展的方法来制造3D碳结构.
  • 探索光催化增长的潜力,用于微观碳模式.

主要方法:

  • 使用低功率可见光和无金属催化剂用于光催化碳增长.
  • 采用一阶段的工艺,使得能够快速制造微观结构.
  • 对微观结构尺寸和阵列模式进行了可调节的控制.

主要成果:

  • 实现了碳棒的快速 (从几秒到几分钟) 3D 打印,尺寸比例高达 ~ 500,直径小于 10 微米.
  • 成功地模拟了一厘米大小的杆子阵列,可调节高度和音调.
  • 创建自定义复杂的3D碳结构与控制的几何.

结论:

  • 开发的光催化方法为3D碳材料制造提供了可持续和高效的途径.
  • 由此产生的碳微结构表现出有希望的发光和欧姆特性.
  • 这项技术对光电子,传感和生物接口应用具有重大潜力.