“…In previous studies, it was reported that infiltration of the CNTs by molecules can expand or distort the nanotube circumference, hence shifting the interband transition energy due to increased radial strain. ,, The energy shift with radial strain σ varies with chiral angle θ according to normalΔ E i i = false( prefix− 1 false) i + 1 false( prefix− 1 false) k + 1 3 t 0 σ .25em sin nobreak0em.25em 3 θ This relationship predicts a strong family-type dependence of the energy shift. In our previous work on solution-state HgTe-infiltrated SWCNTs, a dependence of filling-induced Δ E ii on k was seen for solution-state SWCNTs, with a generally larger Δ E ii for type 1 SWCNTs such as (7,5) and (10,2) than on type 2 SWCNTs such as (8,4) and (6,5). However, no such effect can be seen in the gelatin-embedded samples (Figure c), suggesting that the morphology (gelatin matrix) may prevent or offset substantial radial strain.…”