In this letter, customized protein-based microano-wires with diameters of >= 150 nm have been facilely fabricated from bovine serum albumin (BSA) aqueous ink by maskless and noncontact femtosecond laser direct writing (FsLDW) technology. With the reproducible optimized morphology, the protein-based microanowires here can be applied as optical microano-waveguides with transmission loss of similar to 0.059 dB mm mu m(-1) for 633 nm light. Based on the nature of as-formed protein microano-hydrogels (stimuli-responsive shrinking or swelling), their "smart" environmental stimuli (e.g., pH) responsive features are proved experimentally (similar to 50% output light decrease corresponding to pH value tunning range of similar to 0.4).
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机译：在这封信中，已通过无掩膜和非接触式飞秒激光直接书写（FsLDW）技术，从牛血清白蛋白（BSA）水性墨水轻松制造了直径> = 150 nm的定制的基于蛋白质的微/纳米线。凭借可重现的优化形态，此处基于蛋白质的微/纳米线可以用作光学微/纳米波导，对于633 nm的光，其传输损耗类似于0.059 dB mmμm（-1）。根据形成的蛋白质微/纳米水凝胶的性质（刺激响应的收缩或溶胀），通过实验证明了其“智能”环境刺激（例如pH）的响应特征（对应于pH降低了50％的输出光降低）值调整范围类似于0.4）。
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