Toward the Synthesis of Highly Processable Long-Chain Carbyne Using Multilevel Pulse Injection

Figure 4

Production and extraction of long-chain carbyne using the nanopore template polymerization method. (a) Product of carbyne synthesis in MLPI-cut silicon nitride pores of 0.7 nm diameter. The reaction is carried out under high temperature (900-1500°C) and high vacuum (less than ) for 30 minutes. After completion, amorphous carbon is removed and polyacetylene is added. (b) Polyacetylene reacts with the exposed triple bonds on the ends of carbyne chains to form crosslinks. (c) Physical or chemical removal of the silicon nitride mold exposes the newly synthesized carbyne chain. The rigid linear structure of carbyne chains results in minimal lateral movement to prevent interactions. The exposure is conducted either in an inert atmosphere or in a solution containing a protective coating (e.g., dilute PDDA) to prevent the deteriorative crosslinking mechanism. (d) The carbyne fabric is immersed into a dilute solution of PDDA under high temperature to coat and stabilize the chains.

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