Yu-Sheng Lin

Stretchable IR metamaterial with ultra-narrowband perfect absorption

The integration of a high-performance metamaterial (MM) onto mechanically flexible and deformable substrates offers significant promise in flexible electronics. Here, we propose two types of stretchable infrared (IR) MMs to design a tunable perfect absorber with a ring-shape (PA-RS) and a cross-shape (PA-CS) on a PDMS/Au/PDMS substrate, respectively. By stretching devices along different directions, PA-RS and PA-CS exhibit ultra-narrowband, polarization-dependent/independent, and switchable characterizations in the IR wavelength range. The tuning ranges are 2.37u2009μm and 2.36u2009μm for PA-RS and PA-CS with the deformation quantity of 2.50u2009μm along two-dimensional directions, respectively, without extra power supply. In this deformation range, most of the incident light is perfectly absorbed for PA-RS design operated at a wavelength of 4.31u2009μm and PA-CS design operated at a wavelength of 4.24u2009μm. The corresponding Q-factors of two devices are 98 and 118 for PA-RS and PA-CS, respectively. Such results are very suitable for high-performance refractive index sensor applications. Furthermore, two devices exhibit the functionalities of s-polarization switches and s-/p-polarization switches. To further investigate the characterizations of devices deformed by a tensile force, PA-CS could be actively tuned by bending devices at a certain angle. In the future, these proposed stretchable IR MMs could potentially possess high portability, applicability, and cost-effectiveness for wearable electronic devices in a variety of sensor fields.The integration of a high-performance metamaterial (MM) onto mechanically flexible and deformable substrates offers significant promise in flexible electronics. Here, we propose two types of stretchable infrared (IR) MMs to design a tunable perfect absorber with a ring-shape (PA-RS) and a cross-shape (PA-CS) on a PDMS/Au/PDMS substrate, respectively. By stretching devices along different directions, PA-RS and PA-CS exhibit ultra-narrowband, polarization-dependent/independent, and switchable characterizations in the IR wavelength range. The tuning ranges are 2.37u2009μm and 2.36u2009μm for PA-RS and PA-CS with the deformation quantity of 2.50u2009μm along two-dimensional directions, respectively, without extra power supply. In this deformation range, most of the incident light is perfectly absorbed for PA-RS design operated at a wavelength of 4.31u2009μm and PA-CS design operated at a wavelength of 4.24u2009μm. The corresponding Q-factors of two devices are 98 and 118 for PA-RS and PA-CS, respectively. Such results are very s...

CD-like centrifugal microfluidic device for organophosphorus pesticides (OPP) sensing

A centrifugal microfluidic device (CMD) is demonstrated for organophosphorus pesticides (OPP) sensing. CMD is designed as a CD-like to have a sequential sample injection with capillary valves controlled by centrifugal force, i.e. rotational speed (rpm). OPP in CMD could be successfully derived into a mixer at 570 rpm and then spined into a detection reservoir at 2000 rpm. The experiment results indicated that limit of detection (LD) for OPP is 0.01 ppm. A linear relationship between OPP logarithmic concentration (ppm) and inhibition rate is 0.9215.

Effectively anticancer drug concentration gradients by using 3D microfluidic chip

A 3D microfluidic chip for resistance of H460 lung cancer cells (LCC) was demonstrated. H460 LCC could be restrained by the injection of different curcumin concentration and investigated in different microenvironmental pH conditions. In the range of curcumin concentration of 57.2–100 μg/mL, the average apoptosis rate (AR) of H460 LCC were 53.6%, 58.4%, and 98.0% for pH=6.5, 7.4, and 8.5 microenvironments, respectively. The resistant efficiency of H460 LCC could be enhanced substantially at pH=8.5 microenvironmental condition. These results pave a way for using 3D microfluidic chip in cell biology application.