Dual wavelength two-photon absorption in two-beam laser direct writing silver nanowire and the conductivity enhancement

Abstract

In this work, a phenomenon of dual wavelength two-photon absorption is found in the process of silver nanowire (AgNW) fabrication using the two-beam laser direct writing technique. The resistivity of the AgNW is decreased and stabilized by the electrical current Joule heating annealing process to 8.0 × 10−8 Ω·m. The flexibility of the AgNW is very excellent because the resistance of the AgNW increased only about 2.2 Ω after the stretched bending and compressed bending. The two-beam laser direct writing technique not only could be used to fabricate conductive nanowire on flexible substrate but also helps to understand the process of two-photon absorption with dual wavelength photons.

Electrical and thermal properties of silver nanowire fabricated on a flexible substrate by two-beam laser direct writing for designing a thermometer

“…A two-beam laser direct writing system was used to fabricate the AgNWs on a PET substrate. 14 As shown in Fig. 2 , a femtosecond (fs) laser (Tsunami, Spectra-Physics) and a continuous wave (CW) laser (He-Cd laser, IK5751I-G) are overlapped together by a dichroic mirror (DM) and focused by an oil objective lens (OL) (Olympus, N.A.…”

The phonon scattering mechanism and its effect on the temperature dependent thermal and thermoelectric properties of a silver nanowire

“…The AgNW is fabricated on a polyethylene terephthalate (PET) substrate using a two-beam laser direct writing system. 14,15 In this fabricated system, the femtosecond pulse laser generates the AgNPs from silver ion aqueous solution due to multiphoton absorption 16 and the CW laser forms the AgNW from the AgNPs. 17 The scanning electron microscopy (SEM) image of the AgNW with two electrical pads is shown in Fig.…”