Lecture Presented at Solid State Nuclear Track Detectors (SSNTD) Conference held at GND University held at Amritsar 2oo9. It deals with Ion Tracks Route to Nanotechnology.
Ion Tracks are very Fascinating for both Theoretical and Applied areas of Research. We have used Ion Tracks as a route to nanotechnology, creating Devices known as Ion Track Filters or Membranes.
Ion Tracks are very Fascinating for both Theoretical and Applied areas of Research. We have used Ion Tracks as a route to nanotechnology, creating Devices known as Ion Track Filters or Membranes.
La electroencefalografía es una técnica que permite estudiar la actividad cerebral. Por tanto, la utilizamos para conocer mejor el diagnóstico y la localización de su enfermedad, y en muchos casos la intensidad de una posible lesión. De esta forma, podemos orientar a su médico especialista sobre el diagnóstico y tratamiento a seguir.
Aluksi esittelen luonnon oman säteilyn sis. sähkömagneettiset kentät. Sen jälkeen pohdin, miten ihmisten kehittämät teknologiat voivat häiritä kasvien, hyönteisten ja eläinten toimintaa.
La electroencefalografía es una técnica que permite estudiar la actividad cerebral. Por tanto, la utilizamos para conocer mejor el diagnóstico y la localización de su enfermedad, y en muchos casos la intensidad de una posible lesión. De esta forma, podemos orientar a su médico especialista sobre el diagnóstico y tratamiento a seguir.
Aluksi esittelen luonnon oman säteilyn sis. sähkömagneettiset kentät. Sen jälkeen pohdin, miten ihmisten kehittämät teknologiat voivat häiritä kasvien, hyönteisten ja eläinten toimintaa.
This Lecture was delivered on Science Day celebrations held in SUS College of Engg. & Technology, Tangori. It covers problems of Science education in India at School level, with particular reference to Punjab state. Problems are highlighted but no simple solutions are offered by theAuthors contributions are
Most Scientists Use Chemical Route for Fabrication of Nanomaterials. We also used this route for Nanotechnology.
Reverse Micelle, Hydrothermal, Solvothermal and Co-Precipitation methods are discussed.
It is a Lecture based on MY ESSAY published in MY Book "Scientific Vision in Sri Guru Granth Sahib and Interfaith Dialogue. A comparison of Cosmological Ideas in Religion and Science is made based on Big Bang Model.
Phosphors are materials useful for TL Dosimeters. SK Omanwar made a major contribution to this Paper presented at Nanoscience Conference held in Lucknow University on 21-23 Dec. 2013.
We proposed Single Activation Energy Model for Radiation Damage in SSNTDs, including most of Insulators, for example, Glasses, Polymers and Mineral Crystals. My Ph.D. Scholars,SK Modgil, RK Bhatia, and Gurinder Singh made major contributions in improving this model.
Ion tracks technology proved to be a precursor to Nanotechnology; a technique used in our Laboratory for almost 25 years, with collaboration of GSI, Darmstadt, Germany.
Puran Singh was a great Scientist, Poet and Philosopher, who went to study in Tokyo university (1900-03) at the age of 19. He was a revolutionary in Japan, became a Buddhist, then a Vedanti and returned to Sikhi in a big way. He created new paradigms in Punjabi Literature and deserved a Nobel Prize but he was not sponsored by any Sikh organization! This Lecture was delivered in GND University, Amritsar on 29th January, 2014.
This Lecture was delivered recently in a National Seminar on Man-Nature Relationship in GURU NANAK DEV University, Amritsar. The Sikh View of Man-Nature Relationship and Environmental Ethics is presented. I wonder why the Original Gurbani Quotes in Gurmukhi Fonts do not appear in PPP.
1. My Journey from Ion Track
Technology to Nanotechnology
Hardev Singh Virk
Professor Emeritus
Eternal University, Baru Sahib,
HP, India
2. History of Nuclear Tracks
Rutherford’s discovery Alpha tracks:1906
(Wilson Cloud chamber used as a detector)
Ruchi Ram Sahni studied Alpha tracks in
Nuclear Emulsion in Rutherford Lab.1915
Discovery of Pi Mesons by C.F. Powel using
Nuclear Emulsions in Bristol 1940s
Beva Chowdhary used N. Emulsions for
study of Pi mesons in Calcutta University.
D.Lal, Y.Pal & B.Peters in TIFR used
NE:1950s
3. Routes to Nanotechnology
• Physical, chemical, biological and nature’s self
assembly.
• Top-down and bottom-up approaches.
• Chemical route to nanotechnology is simpler,
cheaper and allows fabrication at bench top
conditions.
• Reverse micelles (microemulsions route) is a
versatile method to produce a variety of
nanoparticles.
4. My Route to Nanotechnology
• Ion Track Technology Route using Heavy Ion
Beams from GSI, Darmstadt & JINR, Dubna.
• Chemical Route of Reverse micelles, co-precipitation,
solvo-thermal, sol-gel and seed
growth techniques.
• Quantum dots, nanorods and nanoneedles of
Barium Carbonate, Barium Oxalate, Iron Oxalate,
Barium hexaferrite, Zinc Oxide, Cadmium
Sulphide, Cadmium Oxide and Silver prepared.
16. Nanowire Fabrication
Template synthesis using polymer and anodic
alumina membranes
Electrochemical deposition
Ensures fabrication of electrically continuous wires
since it only takes place on conductive surfaces
Applicable to a wide range of materials
High pressure injection
Limited to elements and heterogeneously-melting
compounds with low melting points
Does not ensure continuous wires
Does not work well for diameters < 30-40 nm
Chemical Vapor Deposition (CVD) or VLS technique
Laser assisted techniques