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Discovery of carbon nanotubes in sixth century BC potteries from Keeladi, India

Chemistry

Discovery of carbon nanotubes in sixth century BC potteries from Keeladi, India

M. Kokarneswaran, P. Selvaraj, et al.

This groundbreaking research conducted by Manivannan Kokarneswaran, Prakash Selvaraj, Thennarasan Ashokan, Suresh Perumal, Pathikumar Sellappan, Kandhasamy Durai Murugan, Sivanthan Ramalingam, Nagaboopathy Mohan, and Vijayanand Chandrasekaran explores ancient black coatings on pottery sherds from Keeladi, India, revealing advanced nanomaterial synthesis with remarkable stability over 2600 years.

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Playback language: English
Abstract
This research paper investigates unique black coatings found on pottery sherds excavated from Keeladi, India, dating back to the sixth century BC. Using Raman spectroscopy, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), the researchers identified the presence of single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs), and layered sheets within the coating. Notably, the average diameter of the SWCNTs (0.6 ± 0.05 nm) is exceptionally small, close to the theoretical minimum. The findings suggest ancient knowledge of nanomaterial synthesis and highlight the remarkable stability and adhesion of these nanomaterials over 2600 years.
Publisher
Scientific Reports
Published On
Nov 13, 2020
Authors
Manivannan Kokarneswaran, Prakash Selvaraj, Thennarasan Ashokan, Suresh Perumal, Pathikumar Sellappan, Kandhasamy Durai Murugan, Sivanthan Ramalingam, Nagaboopathy Mohan, Vijayanand Chandrasekaran
Tags
black coatings
pottery sherds
Keeladi
nanomaterials
carbon nanotubes
Raman spectroscopy
ancient knowledge

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