3D polarized glasses based on chiral gold nanoparticle sub-lens coating

Abstract

The utility model relates to a pair of 3D (three-dimensional) polarized glasses based on chiral gold nanoparticle sub-lens coating. Circularly polarized light splitting is realized by directionally depositing a levorotatory gold nanoparticle functional layer and a dextrorotatory gold nanoparticle functional layer on the surfaces of a left lens and a right lens respectively. The diameter of the chiral gold nanoparticle is about 200nm, the surface of the chiral gold nanoparticle is modified by L / D-cysteine to form a multi-branch star-shaped structure, and a plasma formant of the chiral gold nanoparticle covers a 500-750nm wave band and is accurately matched with the polarization wavelength of a 3D display system; and mirror symmetry circular dichroism signals with peak values of 45 mdeg are generated at the positions of 569 nm and 699 nm. The left lens L-AuNPs layer selectively transmits left-handed circularly polarized light, the right lens D-AuNPs layer transmits right-handed light, and the CTAB micelle dispersion and silicon dioxide encapsulation layer design is matched, so that the light transmittance of the lenses and the crosstalk rate during 30-degree oblique incidence are reduced, and the polarization extinction ratio is increased. The problems that a traditional polarizing film is sensitive in visual angle and low in light splitting efficiency are solved.

Description

Technical Field

[0001] This utility model relates to a 3D polarized glasses based on chiral gold nanoparticle lens coating. Background Technology

[0002] Existing 3D polarized glasses rely on birefringent polymers or liquid crystal layers, which suffer from low light transmittance, high crosstalk due to viewing angle shift, and severe wide-band dispersion. Although metal nanoparticles can enhance spectral performance through plasma effects, traditional gold nanorod arrays require complex photolithography processes and cannot be adapted to curved lenses. On the other hand, chiral particles prepared by chemical methods have weak circular dichroism and lack chiral matching design for left and right lenses, resulting in polarization crosstalk. Summary of the Invention

[0003] To address the aforementioned shortcomings, this invention provides a 3D polarized glasses based on chiral gold nanoparticle lens coating. It utilizes the strong chiral response (45 mdeg) of L / D-cysteine-modified gold nanoparticles and lens coating technology, along with plasma resonance-enhanced chiral light response and jet printing deposition technology, to achieve a uniform arrangement of particle crystal planes. This solves the problems of viewing angle sensitivity and low spectral efficiency in traditional polarization films, resulting in lightweight and highly stable circularly polarized spectral separation.

[0004] Chiral gold nanoparticles were prepared using a seed growth method. [ [1]Lee, Ahn, Mun, et al. Amino-acid-and peptide-directed synthesis of chiral plasmonic gold nanoparticles [J]. Nature, 2018. [2] Sun, Yang, Sun, et al. Tunable Reversal of Circular Dichroismin the Seed-Mediated Growth of Bichiral Plasmonic Nanoparticles [J]. ACSNano, 2022. ] It forms a multi-branched star-shaped structure through L-cysteine ​​or D-cysteine ​​modification, and its surface is stably suspended by micellar dispersants.

[0005] The resulting chiral gold nanoparticles have a particle size of approximately 200 nm. They are formed as a functional layer through directional deposition (inkjet printing technology). The chiral gold nanoparticles (with the (100) crystal plane preferentially oriented) are dispersed in a functional ink (such as CTAB) and precisely printed onto the surface of a lens substrate using a piezoelectric printhead according to a preset pattern. During this process, the nano-anchoring points etched on the substrate surface guide the (100) crystal plane of the gold nanoparticles to be oriented and adsorbed to form a single-layer close-packed array through geometric matching and surface energy regulation, ensuring the uniformity and stability of the chiral optical properties. Its plasmon resonance peak covers the 500-750 nm band, which is precisely matched with the polarization wavelength of 3D display systems (such as 530 nm green light and 635 nm red light); it generates a mirror-symmetric circular dichroism signal with a peak value of 45 mdeg at 569 nm and 699 nm (peak intensity ±45 mdeg). The left lens's L-AuNPs layer selectively transmits left-handed circularly polarized light, while the right lens's D-AuNPs layer transmits right-handed light. Combined with CTAB micelle dispersion and silica encapsulation layer design, this can reduce lens transmittance, crosstalk rate at 30° oblique incidence, and improve polarization extinction ratio.

[0006] A type of 3D polarized glasses based on chiral gold nanoparticle lens coating. Left-handed and right-handed gold nanoparticle functional layers are oriented and deposited on the substrate surfaces of the left and right lenses, respectively, to achieve circular polarization beam splitting. The L-AuNPs layer of the left lens selectively transmits left-handed circularly polarized light, while the D-AuNPs layer of the right lens transmits right-handed light.

[0007] The aforementioned 3D polarized glasses based on chiral gold nanoparticle lens coating have lenses made of glass, polycarbonate, or resin.

[0008] The aforementioned 3D polarized glasses based on chiral gold nanoparticle lens coating also have a silicon dioxide encapsulation layer outside the gold nanoparticle functional layer.

[0009] The aforementioned 3D polarized glasses based on chiral gold nanoparticle lens coating have periodic nano-anchor points (104) on the surface of the left and right lens substrates to fix the crystal orientation of the gold nanoparticle functional layer; the nano-anchor points are oriented and adsorbed to the (100) crystal plane of the gold nanoparticles to form a single-layer close-packed array.

[0010] The aforementioned 3D polarized glasses based on chiral gold nanoparticle lens coating, wherein the chiral gold nanoparticles have a particle size of about 200 nm and their surface is modified with L / D-cysteine ​​to form a multi-branched star structure.

[0011] Anti-interference composite packaging design: A silicon dioxide encapsulation layer (refractive index 1.46) covers a chiral particle layer. The refractive index gradient transition (CTAB micelles 1.49 → SiO2 1.46 → air 1.0) suppresses Fresnel reflection at the interface, improves light transmittance, and reduces ambient light scattering loss.

[0012] By combining substrate pre-structuring treatment (nano-anchor positioning points) with mechanical reinforcement of the encapsulation layer, the coating reduces crosstalk rate when incident at a 30° angle.

[0013] Beneficial effects: Compared with existing technologies, the beneficial effects are as follows:

[0014] Periodic nano-anchor points are etched onto the glass substrate surface. A functional layer structure is then applied using a split-lens coating. The left lens's L-AuNPs layer selectively transmits left-handed circularly polarized light, while the right lens's D-AuNPs layer transmits right-handed light. This improves the beam splitting efficiency of the left and right lenses, expands the effective viewing angle, and reduces crosstalk at a 30° oblique incidence.

[0015] The plasmon resonance of chiral gold nanoparticles covers the 500-700nm wavelength band, precisely matching 530nm green light and 635nm red light display systems, improving the polarization extinction ratio. The silicon dioxide encapsulation layer, through refractive index gradient design, will improve light transmittance and reduce ambient light scattering loss, achieving high-precision beam splitting and wide viewing angle adaptation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the 3D polarized glasses of this utility model.

[0017] Figure 2 This is a schematic diagram of the functional layer 102 of the 3D polarized glasses of this utility model.

[0018] Figure 3 This is a transmission electron microscopy (TEM) image of chiral gold nanoparticles.

[0019] Figure 4 The results are from the circular dichroism spectroscopy test of the chiral gold nanoparticle coating. Detailed Implementation

[0020] The specific embodiments of this utility model are described below with reference to the accompanying drawings: Example

[0021] like Figure 1 As shown, the 3D polarized glasses consist of a polycarbonate lens substrate 101, a chiral gold nanoparticle functional layer 102, and a silicon dioxide encapsulation layer 103. Left-handed gold nanoparticles (L-AuNPs) are deposited on the surface of the left lens substrate via directional deposition (inkjet printing technology), while right-handed gold nanoparticles (D-AuNPs) are deposited on the right lens substrate. The substrate surface is plasma-etched to form 50nm periodic nano-anchoring points (104) to fix the crystal orientation of the particles (100).

[0022] Chiral gold nanoparticles were prepared using a seed growth method, forming a multi-branched star-shaped structure through L-cysteine ​​or D-cysteine ​​modification, with the surface stably suspended by a micellar dispersant. The functional layer was formed using inkjet printing technology. Based on the pre-formed periodic nano-anchoring points (104) on the substrate surface through plasma etching, the chiral gold nanoparticles (with the (100) crystal plane preferentially oriented) were dispersed in a functional ink (such as CTAB), and precisely printed onto the lens surface according to a preset pattern using a piezoelectric printhead. During this process, the nano-anchoring points, through geometric matching and surface energy regulation, guided the (100) crystal plane of the gold nanoparticles to be oriented and adsorbed to form a monolayer close-packed array, ensuring the uniformity and stability of the chiral optical properties.

[0023] Preparation of chiral gold nanoparticles [ [1]Lee, Ahn, Mun, et al. Amino-acid- and peptide-directed synthesis of chiral plasmonic gold nanoparticles [J]. Nature, 2018. [2] Sun, Yang, Sun, et al. Tunable Reversal of CircularDichroism in the Seed-Mediated Growth of Bichiral Plasmonic Nanoparticles[J]. ACS Nano, 2022. ](1) Preparation of Au seeds: Mix 100 μL of 25 mmol / L HAuCl4, 5 mL of 0.2 mol / L CTAC and 4.9 mL of water, quickly add 450 μL of 20 mmol / L ice-cold NaBH4, stir for 2 minutes to obtain light brown seeds A, and let stand at 30℃ for 1 hour. Take tubes A and B and add 5 mL of 0.2 mol / L CTAC, 4.595 mL of water, 100 μL of HAuCl4, 30 μL of 1 mmol / L KI and 220 μL of 40 mmol / L ascorbic acid (AA) to each tube. Add 55 μL of seeds A to tube A, shake until light red, transfer to tube B and mix for 20 seconds, let stand at 30℃ for 15 minutes, centrifuge and disperse in 1 mL of 1 mmol / L CTAB to obtain seeds B. (2) Synthesis of chiral Au NPs: Wash 1 mL of seeds B with water and resuspend in CTAB. Prepare the growth medium (tube C) (0.8 mL 0.1 mol / L CTAB, 3.95 mL water, 100 μL 10 mmol / L HAuCl4, 240 μL 0.1 mol / L AA), add 10 μL 0.1 mmol / L L / D-Cys and mix, then inject 20 μL of seed B, gently mix for 30 seconds and let stand at 30°C for 2 hours.

[0024] The surface of the gold nanoparticle layer is covered with a silica encapsulation layer, and a gradient refractive structure is formed by sol-gel deposition to reduce interface reflection. The coating on the left lens selectively transmits left-handed circularly polarized light, while the right lens transmits right-handed light. Combined with the encapsulation layer design, this significantly reduces crosstalk during oblique incidence, improving light transmittance and structural stability.

[0025] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0026] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A type of 3D polarized glasses based on chiral gold nanoparticle lens coating, characterized in that, The left and right lens substrates are respectively provided with left-handed and right-handed gold nanoparticle functional layers to achieve circular polarization beam splitting. The L-AuNPs layer of the left lens selectively transmits left-handed circularly polarized light, while the D-AuNPs layer of the right lens transmits right-handed light.

2. The 3D polarized glasses based on chiral gold nanoparticle lens coating according to claim 1, characterized in that, The lens material is glass, polycarbonate, or resin.

3. The 3D polarized glasses based on chiral gold nanoparticle lens coating according to claim 1, characterized in that, A silica encapsulation layer is also provided outside the functional layers of left-handed and right-handed gold nanoparticles.

4. The 3D polarized glasses based on chiral gold nanoparticle lens coating according to claim 1, characterized in that, Periodic nano-anchor points (104) are etched on the surface of the left and right lens substrates to fix the crystal orientation of the gold nanoparticle functional layer; the nano-anchor points are oriented and adsorbed to the (100) crystal plane of the gold nanoparticles to form a single-layer close-packed array.

5. The 3D polarized glasses based on chiral gold nanoparticle lens coating according to claim 1, characterized in that, The chiral gold nanoparticles have a particle size of about 200 nm and their surface is modified with L / D-cysteine ​​to form a multi-branched star structure.

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