Scientists from Rice University have proposed that Thomas Edison might have inadvertently created graphene as early as 1879 during experiments with early incandescent lamps. The study by Professor James Tour’s team was published in the journal ACS Nano.
_large.jpg)
For the experiment, researchers acquired a replica of Edison’s lamp featuring a bamboo filament, closely resembling the original in composition and structure. The filament’s diameter differed by only 5 micrometers. The lamp was connected to a 110 V direct current source and turned on for 20 seconds-longer heating would turn the material into graphite instead of graphene.
After the experiment, scientists noticed the filament’s color changing from dark grey to a characteristic silvery sheen. Raman spectroscopy analysis revealed the presence of segments with a structure corresponding to graphene. Additional data was obtained using transmission electron microscopy, allowing comparison of the material before and after heating.
However, the authors emphasize that the study does not prove Edison consciously created graphene. Even if such material formed, the technology of the late 19th century couldn’t detect it, and over time, the graphene might have degraded into ordinary graphite.
According to Professor Tour, reconstructing historical experiments with modern analytical methods opens up new opportunities for science. He believes re-examining old technologies-vacuum tubes, arc light sources, and early X-ray tubes-from a modern science perspective may lead to unexpected discoveries and uncover effects unnoticed in the past.
Graphene’s Modern Impact
Graphene remains at the forefront of materials science due to its remarkable electrical conductivity and strength. Recent advancements include its use in flexible electronics, enhanced battery technologies, and potential contributions to quantum computing. These cutting-edge applications underscore the significance of graphene’s discovery and its historical context, enhancing the narrative around Edison’s accidental synthesis.
The Value of Revisiting Old Experiments
Re-examining historical experiments has led to significant breakthroughs. Modern technology enables scientists to detect and harness materials that were previously overlooked. This approach not only aids in verifying historical scientific claims but also inspires innovative solutions in contemporary science. For instance, vacuum tubes are being reconsidered for nanotechnology applications, showcasing the value of learning from past technologies.
