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相关概念视频

Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

20.1K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
20.1K
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

14.8K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
14.8K
Physical and Chemical Properties of Matter02:57

Physical and Chemical Properties of Matter

166.3K
The characteristics that enable us to distinguish one substance from another are called properties.
166.3K
Cold Weather Concreting01:27

Cold Weather Concreting

375
When freshly poured concrete is exposed to freezing temperatures before it has set, the water within the concrete can freeze. This expansion disrupts the setting process, delays chemical reactions necessary for hardening, and increases the volume of pores within the hardened concrete, which weakens its overall structure. If the concrete manages to reach an appreciable strength before it freezes, the damage can be somewhat mitigated.
To counteract the negative impacts of cold weather, ensuring...
375
Physical Properties Affecting Solubility02:19

Physical Properties Affecting Solubility

26.5K
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
26.5K
Physical Pendulum01:06

Physical Pendulum

2.8K
When a rigid body is hanging freely from a fixed pivot point and is displaced, it oscillates similar to a simple pendulum and is known as a physical pendulum. The period and angular frequency of a physical pendulum are obtained by using the small-angle approximation and drawing parallels with a spring-mass system. The small-angle approximation (sinθ=θ) is valid up to about 14°.
When dealing with complicated systems, the mass moment of inertia is an important parameter, as it...
2.8K

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相关实验视频

Updated: Jan 31, 2026

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet
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通过冷喷沉积实现的物理不可克隆的表面.

Jaehun Jeon1, Semih Akin1,2

  • 1Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.

ACS applied materials & interfaces
|January 29, 2026
PubMed
概括

这项研究引入了一种创新的方法,用于使用冷喷沉积和加密编码来创建安全的,不可克隆的表面. 这种物理非克隆功能 (PUF) 技术提供了一个可扩展的解决方案,用于验证零件的真实性和防止伪造.

关键词:
在SHA-256中使用SHA.沃罗诺伊分析添加剂制造 添加剂制造 添加剂制造冷喷雾喷雾是一种冷气喷雾.进行加密,加密.一部分验证真实性.物理不可克隆的功能 (PUF)物理上的不可克隆的表面.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 密码学 密码学 密码学 密码学
  • 表面工程是什么?表面工程是什么?

背景情况:

  • 假冒部件的日益普及,需要先进的认证方法.
  • 现有的物理非克隆功能 (PUF) 面临着高吞吐量,成本效益高的制造和安全编码方面的挑战.
  • 在关键行业需要强大的可追溯性和防改解决方案.

研究的目的:

  • 开发一种创新,可扩展和具有成本效益的方法来制造物理不可克隆的函数 (PUF).
  • 整合算法特征提取和加密编码以实现安全的部件身份验证.
  • 为了解决当前PUF制造技术的局限性.

主要方法:

  • 利用冷喷雾 (CS) 颗粒沉积,在基板上使用金属和光微粒子创建独特的发光模式.
  • 采用紫外线照射来捕捉粒子分布,随后进行图像二元化和沃罗诺伊分析以提取特征.
  • 使用SHA-256算法加密提取特征,生成用于身份验证的安全认证密钥.

主要成果:

  • 通过CS工艺证明了PUF的高吞吐量和可扩展的生产.
  • 证实了生成的发光模式的独特性和稳定性.
  • 验证了SHA-256加密认证密钥的有效性,以实现可靠的部件认证.
  • 在热循环和化学物质暴露等环境压力因素下展示了PUF的可靠性.

结论:

  • 提出的基于冷喷涂的PUF制造方法是有效的,可扩展的,并且具有成本效益.
  • 这种方法为安全的部件身份验证和可追溯性提供了强大的解决方案.
  • 该技术具有强大的潜力,可以在航空航天,国防和先进制造业中提供防伪解决方案.