Scholarlink

<p>Pulsed nature of plasma offers an efficient way to control film chemistry during plasma polymerization using very low average power. The pulsed plasma approach helps in introducing and retaining reactive surface functional groups at controlled densities, provides an efficient way of molecular tailoring of surfaces. We have, in the present work, investigated the control of –OH and –COOH groups within plasma-polymerized methacrylic acid (PPMAA) films synthesized using pulsed plasma technique. These groups are very important to attach biomolecules for a variety of applications. We demonstrate that the film chemistry is different for the films deposited at the same duty cycle of the pulse but with different ON and OFF times that influence the deposition rate. These films are characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, surface profilometer, AFM and contact angle measurement. XPS and FTIR studies confirmed incorporation of –OH and –COOH groups onto the film surface. Contact angle results reveal that contact angle decreases from 64º to 41º for 1/15 and 3/90 ms pulse respectively revealing hydrophilic nature of the films. Thickness of the films have been varied from 360Å to 2600Å for CW and 3/30ms pulse respectively, while keeping deposition time 15&#xa0;min constant. These results illustrate that pulsed plasma polymerization can be effectively utilized to tailor film chemistry for various applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Controlling Film Chemistry Using Pulsed Plasma Polymerization of Methacrylic Acid Precursor Monomer

  • 期刊论文

  • 发表日期：

    2026年3月12日

查看全文
  • Ravikumar Singh,
  • Pushpinder G. Bhatia,
  • R. R. Deshmukh

摘要

Pulsed nature of plasma offers an efficient way to control film chemistry during plasma polymerization using very low average power. The pulsed plasma approach helps in introducing and retaining reactive surface functional groups at controlled densities, provides an efficient way of molecular tailoring of surfaces. We have, in the present work, investigated the control of –OH and –COOH groups within plasma-polymerized methacrylic acid (PPMAA) films synthesized using pulsed plasma technique. These groups are very important to attach biomolecules for a variety of applications. We demonstrate that the film chemistry is different for the films deposited at the same duty cycle of the pulse but with different ON and OFF times that influence the deposition rate. These films are characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, surface profilometer, AFM and contact angle measurement. XPS and FTIR studies confirmed incorporation of –OH and –COOH groups onto the film surface. Contact angle results reveal that contact angle decreases from 64º to 41º for 1/15 and 3/90 ms pulse respectively revealing hydrophilic nature of the films. Thickness of the films have been varied from 360Å to 2600Å for CW and 3/30ms pulse respectively, while keeping deposition time 15 min constant. These results illustrate that pulsed plasma polymerization can be effectively utilized to tailor film chemistry for various applications.