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Classification of Nanoparticles and Description about Nanorods
- 1. Classification of Nanoparticles zero-dimensional (0-D) one-dimensional (1-D) two-dimensional (2-D)
- 2. Classification of Nanoparticles zero-dimensional (0-D) one-dimensional (1-D) two-dimensional (2-D)
- 4. One-Dimensional (1-D) Needle-like shape structure Can be broadly divided into 3 category: Nanorods Nanotubes Nanowires Long Gold Nanorods Source: nanoseedz.com
- 5. NANOTUBES Nanotubes are tiny cylindrical structures with nanometer-scale diameters and micrometer-scale lengths. They can be made of various materials, including carbon, boron nitride, and metals. Carbon nanotubes (CNTs) are the most well- known type of nanotubes, and they are made of rolled-up graphene sheets Carbon nanotubes source ; nanotechz.com
- 6. Graphene sheet to Single walled nanotube
- 7. NANOWIRES One-dimensional nanostructures that have a large length to diameter aspect ratios, Distinction can be done on the basic of its mechanical properties Nanowires source ; ScienceDirect.com
- 8. NANORODS Similar to nanowires but nanorods have low aspect ratio as and generally < 5 micro meter in length Due to which shows different properties Long Gold Nanorods Source: nanoseedz.com
- 10. Nanowires One-dimensional nanostructures that have a large length to diameter aspect ratios, Distinction can be done on the basic of its mechanical properties. Nanorods Nanotubes Similar to nanowires but nanorods have low aspect ratio as and generally < 5 micro meter in length Due to which shows different properties. Are hollow tubes or bamboo like structure and can be singled or multi walled.
- 11. Nanorods and Nanowires Nanorods - low aspect ratio as and generally < 5 micro meter in length. Nanowires - have a large length to diameter aspect ratios. Due to which shows different properties.
- 12. Nanowires One-dimensional nanostructures that have a large length to diameter aspect ratios, Distinction can be done on the basic of its mechanical properties. Nanorods Nanotubes Similar to nanowires but nanorods have low aspect ratio as and generally < 5 micro meter in length Due to which shows different properties. Are hollow tubes or bamboo like structure and can be singled or multi walled.
- 13. Synthesis Various nanorods have been extensively studied such as carbon nanorods, ZnO nanorods, gold nanorods and magnetic nanorods. Recently, various techniques have been proposed for synthesizing the nanorods. For different type of nanorods different technique and method is being used to synthesis these rod.
- 14. Synthesis ● Physical methods such as vapor deposition and laser ablation ● Chemical methods such as chemical vapor deposition, sol-gel and hydrothermal synthesis ● Biological methods such as bacteria-assisted synthesis and template-assisted synthesis. The choice of synthesis method depends on several factors such as the type of material being synthesized, the desired size and shape of the nanorods, and the intended application of the nanorods
- 15. LET'S TAKE AN EXAMPLE TO UNDERSTAND BETTER
- 16. ZnO nanorods Synthesis High oriented array of ZnO nanorods can be produced via various chemical, electrochemical and physical deposition techniques such as ● Chemical vapor deposition (CVD) or metal organic CVD ● Vapor-liquid-solid (VLS) growth ● Electrochemical deposition (ED) ● Hydrothermal approaches.
- 17. A great deal of attention has been focused on the study of synthesizing the ZnO nanorods via VLS method. ● Vapour liquid solid growth
- 18. ● Gold (Au) nanoparticles are used as catalyst in order to promoting the ZnO nanorods formation ● It required high growth temperature > 900°C in order to dissolving the Zn vapor into the Au catalyst ● Zn precipitates out from the droplet and further oxidized as ZnO nanorods grow.
- 20. Applications Of ZnO nanorods ● Gas Sensor ZnO functions as a gas sensitive material due to its electrical conductivity that can be dramatically affected by the adsorption or desorption of gas molecules on its surface [ZnO functions as a gas sensitive material due to its electrical conductivity that can be dramatically affected by the adsorption or desorption of gas molecules on its surface. There are many gasses that can be detected by ZnO nanowires, such as NO , NO2 , CO , NH3, H2, O2, and ethanol Response curve of a ZnO gas sensor exposed to 10 ppb NO2 gas at 250°C
- 21. Applications Of ZnO nanorods ● Energy production The unique shape of ZnO nanorods enhances their light- absorbing properties and provides a large surface area for efficient electron transport. As a result, ZnO nanorod-based solar cells have shown improved photovoltaic performance compared to traditional planar ZnO solar cells.
- 22. Applications Of Gold Nanorods Gold nanorods have a wide application in medical fields
- 23. Applications Of Gold Nanorods Drug delivery: Gold nanorods can be functionalized with drugs and used as carriers to target specific cells or tissues, improving the efficacy of the drugs.
- 24. Applications Of Gold Nanorods Photothermal therapy: Gold nanorods can be used in cancer therapy by converting light energy into heat to kill cancer cells.
- 25. Applications Of Gold Nanorods Catalysis: Gold nanorods have been shown to be effective catalysts in various chemical reactions, and they have the potential to be used in applications such as environmental remediation and energy conversion. Sensors: Gold nanorods can be used as highly sensitive and selective sensors for a variety of analytes, including heavy metals, pathogens, and small molecules.