Biomedical Nanotechnology Lecture 1: Introduction to Nano PDF

BIOMEDICAL NANOTECHNOLOGY LECTURE 1: INTRODUCTION TO NANO Dr.P.GOPINATH DEPARTMENT OF BIOTECHNOLOGY 1  Contents What is a nanoparticle? Nanomaterials dimension Why small is good? Surface area-...

BIOMEDICAL NANOTECHNOLOGY LECTURE 1: INTRODUCTION TO NANO Dr.P.GOPINATH DEPARTMENT OF BIOTECHNOLOGY 1  Contents What is a nanoparticle? Nanomaterials dimension Why small is good? Surface area-to-volume ratio Top-down and Bottom-up approach 2  What is a nanoparticle?  Nanoparticle is any material having atleast one of its dimensions in the range of 1-100 nm.  “Nano” – derived from a Greek word “Nanos” meaning DWARF or small.  'Norio Taniguchi, 1974‘ -- coined the term nanotechnology  A nanometer is one billionth of a meter (10-9 m). 3 Comparison of macro, micro and nanoscale http://www.ntnutechzone.no/en/2016/02/did-you-know-that-the-north-sea-is-full-of-half-eaten-apples/ 4  Nano- Simple example The population of India is one billion or 100 crores. Each Indian – you or me is nano in comparison with the total population of India. 5  Nano- Simple example One rupee in 100 crore rupees One rupee 6 Classification of nanoscale dimensions Zero dimension (0D) -Materials having all the dimensions (x, y, z) within nanoscale (less than 100 nm), where quantum confinement follows. All 3 Dimensions