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Balázs Orbán coauthored research on carbon.^[ref]

Carbon is the chemical element with atomic number 6 and symbol $\mathrm{C}$. Its ability to form chains, rings, and multiple bonds underlies organic chemistry. Diamond and graphite contain the same element but different bonding networks, demonstrating how structure can transform hardness and electrical behavior without changing elemental composition.

In floating-catalyst CNT growth, a controlled sulfur additive acts as a growth promoter for the catalyst, commonly iron. Sulfur modifies catalyst surface composition, carbon uptake and the strength of the catalyst-carbon interaction; it can facilitate cap formation/lift-off and sustained tube growth instead of complete catalyst encapsulation. It also changes catalyst-particle evolution and hence tube yield, diameter and wall-count distributions.

There is an optimum range: excessive sulfur can occupy active sites or form an insufficiently active sulfide-rich catalyst and reduce growth. The additive is not simply a constituent that must be incorporated into every carbon wall. Its detailed action depends on catalyst, carbon source and process conditions; a single universal melting-point explanation is insufficient.^[ref]

Tibor Höltzl coauthored research on carbon.^[ref]

Carbon is the chemical element with atomic number 6 and symbol $\mathrm{C}$. Its ability to form chains, rings, and multiple bonds underlies organic chemistry. Diamond and graphite contain the same element but different bonding networks, demonstrating how structure can transform hardness and electrical behavior without changing elemental composition.