Large‐scale and low‐cost fabrication techniques are needed to commercialize highly efficient, nanomaterial‐based thermoelectric generators (TEGs) for use in small‐scale, flexible applications (e.g., wearable energy harvesters). This study presents the first demonstration of inkjet‐printed networks of phase‐pure, single‐crystalline Bi2Te3 thermoelectric nanowires (BTNWs) that are amenable to large‐scale production. The BTNWs are synthesized via chemical batch processing and formulated into a jettable ink that is printed onto glass substrates and subsequently annealed in nitrogen and forming gas environments. The inkjet‐printed BTNWs annealed in forming gas provide the most favorable results with comparable thermoelectric performances to bulk Bi2Te3 materials (Seebeck coefficient up to 140 µV K−1) while approximately utilizing only 1% to 3% of the telluride materials found in their bulk counterparts. Thus, these printed BTNWs help pave the way for the development of low‐cost and scalable TEGs.

We report the solution-phase synthesis of iron telluride with controllable reversible switching behavior between p- and n-type conduction.

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Microfibrillated cellulose (MFC) or Nanofibrillated cellulose (NFC) has been used to reduce the use of raw pulp and to improve paper strength. The problem of MFC preparation is high manufacturing cost. In this study, it was carried out to prepare MFC after enzyme beating and estimated properties of MFC. Endo-D was the best beating efficiency among three type of endo-glucanase. As the grinder pass number increased, the viscosity and the fines of MFC suspension increased while the crystallinity and the porosity of MFC sheet decreased. Also enzyme beating MFC was higher value in the crystallinity and lower value in the viscosity than non-enzyme MFC. In addition, the aspect ratio of MFC was the highest at 5 pass. MFC addition improved the handsheet strength and the air permeability but worsened the drainage.

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