ذرات دوخاصیتی: 1- طراحی و تهیه

نوع مقاله : تالیفی

نویسندگان

دانشکده علوم شیمی و نفت، گروه پلیمر و مواد، دانشگاه شهید بهشتی، تهران، ایران

چکیده

در آیین روم‌، دوخاصیتی خدایی بود که به ­عنوان متولی جهان شناخته می‌شد. او معمولاً با دو سر در خلاف جهت هم نشان داده می‌شد تا هم­زمان به دو جهت نگاه کند. از اصطلاح «دوخاصیتی» برای توصیف ذراتی استفاده ‌می ­شود که دارای دو چهره با ویژگی ­های فیزیکی یا شیمیایی مختلف هستند. ذرات دوخاصیتی با ساختار نامتقارن قابل ­تنظیم و ویژگی­ های منحصر به فرد، توجه پژوهشگران را جلب کرده ­اند. این ناهمسان­گردی می ­تواند به پدیده­ هایی مانند خودگردایش یا فعالیت­ های سطحی منجر شود. ذرات دوخاصیتی از دهه 1990 میلادی، تحت بررسی ­های علمی درخور توجهی قرار گرفتند. در این بررسی، روش ­های سنتز قدرتمندی چون پوشاندن، جدایی فاز و خودگردایش ارائه شده­ اند که برای تهیه ذرات دوخاصیتی با خواص و شکل ­شناسی­­ های مختلف به ­کار می­روند. این مطالعه مروری، به ­طور انحصاری روی ذرات دوخاصیتی، شامل مواد پلیمری تمرکز دارد. طبقه ­بندی­ های مختلف روش ­های سنتز ذرات دوخاصیتی از جمله برخی زمینه­ های تاریخی به­ طور ویژه شرح داده است. همچنین، به­ منظور کمک به پژوهشگران تازه ­وارد به زمینه ساخت یا استفاده از این ذرات، پیشرفت­ های اخیر در این زمینه را توصیف و جوانب مثبت و منفی روش ­های مختلف با نگاهی به مسیرها و کاربردهای آینده ارزیابی شده ­اند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Janus Particles: 1- Design and Preparation

نویسندگان [English]

  • Maede Ramezanpour
  • Abbas Rezaee Shirin-Abadi
Department of Polymer & Materials Chemistry, Faculty of Chemistry & Petroleum Sciences, Shahid Beheshti University. Tehran, Iran
چکیده [English]

In Roman religion, Janus was a god known as the custodian of the universe. He was usually shown with two heads in opposite sides to look in two directions at the same time. The term "Janus" is used to describe particles that have two faces with different physical or chemical characteristics. Janus particles with adjustable asymmetric structure and unique properties have attracted the attention of researchers. This anisotropy can lead to phenomena such as self-assembly or surface activity. since 1990s, Janus particles have been subjected to significant research. In this article, powerful synthesis methods including masking, phase separation and self-assembly, which are used to prepare Janus particles with different properties and morphologies, are described. This review focuses exclusively on Janus particles that contain polymeric materials. The different classes of synthesis methods of Janus particles, including some historical contexts, have been specially described. Also, in order to help new researchers in the field of making or using these particles, recent developments in this field have been described and the pros and cons of different methods have been evaluated with a view to future directions and applications.

کلیدواژه‌ها [English]

  • Janus particles
  • Janus particle design
  • Masking
  • phase separation
  • self-assembly
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