Antireflective surface with a step in the taper: Numerical optimization and large-area fabrication

Shinotsuka, Kei; Hongo, Koki; Dai, Kotaro; Hirama, Satoru; Hatta, Y.

doi:10.7567/jjap.56.022202

Cited by 3 publications

(2 citation statements)

References 68 publications

(108 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The original microstripe structure (master mold) was initially fabricated at the surface of a single crystal Si substrate (Miller index of the crystal plane 110) by a lithographic process using a monolayer colloidal particle mask formed by the Langmuir-Blodgett method and a subsequent plasma etching process (figure 1(a)) [6][7][8]. Spherical colloidal silica of ca.…”

Section: Nanofabrication Processmentioning

confidence: 99%

Microstripe pattern substrate consisting of alternating planar and nanoprotrusive regions improved hiPSC-derived cardiomyocytes’ unidirectional alignment and functional properties

Saotome,

Yatsuka,

Minowa

et al. 2024

Biomed. Mater.

Self Cite

View full text Add to dashboard Cite

The alignment of each cell in human myocardium is considered critical for the efficient movement of cardiac tissue. We investigated 96-well microstripe-patterned plates to align human induced pluripotent stem cell (iPSC)-derived cardiomyocytes (CMs), which resemble fetal myocardium. The aligned CMs (ACMs) cultured on the microstripe-patterned plates exhibited pathology, motor function, gene expression, and drug response that more closely resembled those of adult cells than did unaligned CMs cultured on a flat plate (FCMs). We used these ACMs to evaluate drug side effects and efficacy, and to determine whether these were similar to adult-like responses. When CMs from patients with hypertrophic cardiomyopathy (HCMs) were seeded and cultured on the microstripe-patterned plates or layered on top of the ACMs, both sets of HCMs showed increased heart rate and synchronized contractions, indicating improved cardiac function. It is suggested that the ACMs could be used for drug screening as cells representative of adult-like cardiomyocytes and be transplanted in the form of a cell sheet for regenerative treatment of heart failure.

show abstract

Section: Nanofabrication Processmentioning

confidence: 99%

Microstripe pattern substrate consisting of alternating planar and nanoprotrusive regions improved hiPSC-derived cardiomyocytes’ unidirectional alignment and functional properties

Saotome,

Yatsuka,

Minowa

et al. 2024

Biomed. Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A stepped concave paraboloid, fabricated on the whole surface of a 6 in. Si wafer (sufficient size for industrial utilization) by dry etching exhibited a measured reflectance of 0.077% on average in the visible range [54].…”

Section: Ii4 Silicon Nanoparaboloidsmentioning

confidence: 99%

Design and optimization of silicon nanostructures

et al. 2019

View full text Add to dashboard Cite

In this work, recent advances in various silicon nanostructures used in crystalline silicon solar cells for antireflection and light trapping are reviewed. Simulations and optimizations are also performed for the most relevant of these nanostructures. The results showed that nanocones and nanoparaboloids outperform nanopillars and give almost the same antireflective performance, reducing the average reflectance of the crystalline silicon surface below 2% in the wavelength range 300-1100 nm and under normal incidence. This reflectance is also found to stay below 4% for angles of incidence lower than 60° and for the averaged s and p light polarization. As a result, short-circuit current densities of 41.62 and 41.96 mA/cm², can be expected for a silicon solar cell decorated with these two nanostructures, respectively. Finally, we described the formation of silicon nanocones via nanowires by metal assisted chemical etching.

show abstract

Nanoimprintable super antireflective matte black surface achieved by hierarchical micro and nano architecture

Shinotsuka

Dai

Shen

et al. 2021

Journal of Applied Physics

View full text Add to dashboard Cite

We report an effective antireflective surface structure fabricated by a sequential process comprising colloidal lithography, maskless plasma etching, and inverted nanoimprinting replication. The hierarchical inverse micro–nano structure is composed of randomly positioned microholes of 3–5 μm in diameter and numerous nanoprotrusions of 60–80 nm diameter located at the bottom surface of the microholes. The inverse micro–nano structure behaves as a high-performance light absorber, exhibiting outstanding optical performances of 0.78% for hemispherical reflectance, and 0.011% for specular reflectance at the incident angle 5° off normal, both on average in the visible range (380–780 nm). Additionally, the optical behavior of the inverse micro–nano structure is numerically investigated with the electric field strength in both frequency and time domains by the finite-element method for Maxwell's equation. As the inverse micro–nano structure exhibits significantly low reflectance and black appearance, it can be applied to antiglare/antireflective surfaces, suitable for the reduction of stray light existing inside of a housing of optical instruments.

show abstract

Antireflective surface with a step in the taper: Numerical optimization and large-area fabrication

Cited by 3 publications

References 68 publications

Microstripe pattern substrate consisting of alternating planar and nanoprotrusive regions improved hiPSC-derived cardiomyocytes’ unidirectional alignment and functional properties

Microstripe pattern substrate consisting of alternating planar and nanoprotrusive regions improved hiPSC-derived cardiomyocytes’ unidirectional alignment and functional properties

Design and optimization of silicon nanostructures

Nanoimprintable super antireflective matte black surface achieved by hierarchical micro and nano architecture

Contact Info

Product

Resources

About