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Indicators02:39

Indicators

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Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
48.9K

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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
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自毁结构性颜色液体用于时间-温度指示.

Chao Huang1, Yuanyuan Shang1,2, Jiachuan Hua1

  • 1Institute of Biomedical & Health Engineering, Shenzhen Institute of Advanced Technology (SIAT), Chinese Academy of Sciences (CAS), Shenzhen 518055, P. R. China.

ACS nano
|May 31, 2023
PubMed
概括
此摘要是机器生成的。

新的自我破坏性结构色液体 (SCLs) 为疫苗提供可靠的冷链运输监控. 这些先进的时间-温度指标 (TTIs) 为温度外游提供视觉线索,提高疫苗的安全性.

关键词:
一个光子晶体的光子.自杀是一种自我毁灭的行为.结构色彩 结构色彩热响应式热响应式时间-温度指示器指标

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科学领域:

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

背景情况:

  • 疫苗对流行病至关重要,但冷链运输面临当前时间温度指标 (TTIs) 的挑战.
  • 现有的TTI具有局限性,包括不稳定性,狭窄的温度范围和对光等环境因素的敏感性.
  • 可靠的监测对于保持整个供应链的疫苗有效性至关重要.

研究的目的:

  • 开发新的自我破坏性结构色液体 (SCLs),用于先进的时间温度指示.
  • 在冷链监测中克服传统TTI的局限性.
  • 为了创建一个更强大的和多功能解决方案来跟踪疫苗储存条件.

主要方法:

  • 开发结构性彩色材料,利用流体性质和合体光子晶体.
  • 通过代理扩散引发,不可逆转的颜色破坏的工程SCL.
  • 对SCL的特征是灵敏度,可调节的破坏时间和广泛的温度范围的兼容性.

主要成果:

  • 已证明具有固有的不可逆转性和对温度变化的优越敏感性的SCLs.
  • 实现了可调节的自毁时间,从几分钟到几天.
  • 验证了SCLs的广泛跟踪温度范围,从-70°C到+37°C.
  • 展示了SCL的方便包装成灵活的TTI,用于视觉或手机检查.

结论:

  • 自毁SCL为智能时间温度指示提供了一个有希望的下一代解决方案.
  • 这些SCL提高了对各种疫苗的冷链运输要求的兼容性.
  • 开发的技术解决了传统TTIs的缺陷,改善了疫苗安全性和监测能力.