Done by Glenn Chua 3P305. NANOPARTICLES Brief Introduction.

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Presentation transcript:

Done by Glenn Chua 3P305

NANOPARTICLES Brief Introduction

N ANOPARTICLE Sized between 1 and 100 nanometers (10 −9 m) Nanoparticles may or may not exhibit size- related properties that differ significantly from those observed in fine particles or bulk materials

N ANOMATERIAL Brief Introduction

N ANOMATERIAL Materials Science-based approach to nanotechnology Studies materials with morphological features on the nanoscale

N ANOMATERIAL Various materials

N ANOGOLD Also known as colloidal gold

N ANOGOLD ( PROPERTIES ) Colloidal gold is a suspension of sub micrometre sized particles of gold in a fluid. The liquid is usually red or a dirty yellowish, depending on size of particles, with red being for <100nm and dirty yellowish for larger particles.

N ANOGOLD (U SAGE ) Due to the unique optical, electronic and molecular-recognition properties of gold nanoparticles, they are the subject of substantial research, with applications in electron microscopy as well as in health and medical applications.

N ANOGOLD (U SAGE ) Electron microscopy  Colloidal gold particles can be attached to many traditional biological probes  Particles of different size are easily distinguishable in electron micrographs, allowing simultaneous multiple labelling experiments.

N ANOGOLD (U SAGE ) Health and medical applications  Therapy for rheumatoid arthritis in rats  Relieves pain with implantation near arthritic joints  Combination of microwave radiation and colloidal gold can destroy beta-amyloid fibrils and plaque associated with Alzheimer's disease  Investigated as carriers for drugs such as Paclitaxel  Cancer research, where it can be used to target tumors.

S ILVER NANOPARTICLES

S ILVER NANOPARTICLES ( PROPERTIES ) 1nm-100nm in size Some silver are composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms.

N ANOGOLD (U SAGE ) Bone cement Surgical instruments Surgical masks Wound dressings Treatment of HIV-1 Found in products by Samsung, called Silver Nano Used as the cathode in silver oxide battery

I RON N ANOPARTICLES Nanoscale Iron particles

I RON NANOPARTICLES ( PROPERTIES ) Highly reactive because of large surface area Rapidly oxidizes in presence of oxygen and water to form free ions

I RON NANOPARTICLES (U SAGE ) Remediation of industrial sites contaminated with chlorinated organic compounds Widely used in medical and laboratory applications

P LATINUM N ANOPARTICLES

P LATINUM N ANOPARTICLES ( PROPERTIES ) Usually in the form of a suspension or colloid Size ranges between 2-3 nm Trillions of platinum nanoparticles are suspended in brownish red or black coloured colloidal solution.

P LATINUM N ANOPARTICLES (U SAGE ) Has antioxidant properties, are the subject of substantial research with applications in a wide variety of areas  Medicine  Synthesis of novel materials with unique properties

R EFERENCES les cles

T HANK YOU I hope you have enjoyed my presentation!