Page 12 - Bullion World Volume 04 Issue 07 July 2023

Bullion World | Volume 3 | Issue 7 | July 2023

Dr Amol A Kulkarni: This presentation wholly focused conductive ink pens for educational purposes, and Silver
on Silver Nanowires with a case study about the different ink in tubes for educational, research and conductive
morphologies of Silver, mainly Nano-rods, Nano- glue applications. They have developed an innovative
particles, and Nano-prisms, followed by a study on the processing route to achieve uniform distribution of silver.
synthesis method. Silver nanowires (AgNWs) combine Trials have been carried out for conducting adhesive with
high electrical conductivity with low light extinction in the potential customers. Their low-temperature paste has
visible and are used in a wide range of applications, from been regularly sold in small quantities to academic and
transparent electrodes to temperature, mobile screens, research organizations. They have developed pastes for
and pressure sensors. screen-printed heaters for a company.
(awaiting slides)

Prof. Parag Bhargava: He discussed the Silver related
work carried out at IIT Bombay. Silver raw materials
are produced through wet chemical synthesis at the
IIT lab. The key aspects are - Chemical reduction of
silver nitrate, Control of shape and size/morphology,
Size distribution, and Low degree of agglomeration or
ready-to-disperse powders. They also make Silver inks
and pastes for printed and electronic applications. Silver

Professor SubhoDas Gupta (IISc, Bangalore): Speech was related to low-temperature curable silver nano ink
for PET/paper/glass/textile substrates. Displays, Conductive ink, Sensors, OLED Lighting, and Batteries are a few
disruptive industry products dominating the market and requiring silver. The growth rate of these items is multiplying
year by year. Silver ink, as compared to its other substitutes, is Air-stable, has Good anti-oxidation resistance, is
Non-toxic and inexpensive, has very low bulk resistivity~ 1.6×10-8 Ω.m, and is easily formulated into easy-to-print
nano inks with a decent shelf life.

12