相关实验视频
Updated: May 3, 2026
09:57
A Versatile Method of Patterning Proteins and Cells
Published on: February 26, 2017
9.8K
微型图案聚化物表面上的双生物分子图案,在邻近的位置带有相反电荷的聚合物刷
Meenakshi Verma1, Zhaowei Jiang2, Anita Shukla2
1Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas 110016, India.
ACS biomaterials science & engineering
|March 2, 2026
概括
研究人员开发了一种新的方法,通过交替的正负聚合物刷来创建微型图案表面. 这一突破可以精确控制生物分子相互作用,用于诸如生物传感器和抗菌表面等应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 表面科学是一门学科.
背景情况:
- 带有聚合物刷的微型图案表面可以精确控制生物分子相互作用.
- 使用相反电荷的聚合物刷子创建表面是具有挑战性的,因为静电干扰.
研究的目的:
- 开发一种简单的策略,在可生物降解基板上使用交替的阴离子和阴离子聚合物刷制造微型图案表面.
- 证明这些表面对生物分子微阵列的有用性,并评估它们的生物特性.
主要方法:
- 在聚化物 (PLA) 基板上利用表面启动的原子转移基聚合 (SIATRP).
- 采用掩盖/揭示技术与临时阻断策略 (tributylamine) 结合,使其能够顺序接种阳离子 (多,3-硫甲酸,PSPMA) 和阴离子 (多,2-甲) 乙烯,三甲化,PMETA) 刷子.
- 通过降低pH值来降低阳离子群的保护,可以创建负电相反的双刷表面.
主要成果:
- 成功地在PLA上制造了明确的微型图案表面,交替使用PMETA和PSPMA刷子.
- 证明了这些表面在创建蛋白质和DNA微阵列中的应用.
- 双刷表面表现出细胞相容性,血液相容性和显著的抗菌活性.
结论:
- 开发的方法为在微型图案表面上创建复杂的聚合物刷架构提供了一个强大的平台.
- 反向充电的双刷表面显示出高级生物医学应用的巨大潜力,包括生物传感和抗菌材料.
相关概念视频
01:29Covalent Bonds
142.1K
Overview
142.1K
03:37Molecular Shape and Polarity
53.0K
Dipole Moment of a Molecule
53.0K
02:35Noncovalent Attractions in Biomolecules
28.0K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
28.0K
01:29Potential Due to a Polarized Object
946
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
946
01:08Covalent Bonds
9.5K
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
9.5K
01:30The Electrical Double Layer
241
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
241