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Regulating and controlling method for localized surface plasmons of copper selenide nanoparticles

A localized surface plasmon and nanoparticle technology, applied in the field of electric variable adjustment and control, can solve the problems of quantitative difficulty, lack of dynamic reversibility, unclear carrier control mechanism, etc., and achieve simple electrode preparation process and good cycle stability Good performance, regulation and cycle stability

Pending Publication Date: 2019-09-13
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods lack dynamic reversibility, are difficult to quantify, and the corresponding carrier regulation mechanism is not clear

Method used

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  • Regulating and controlling method for localized surface plasmons of copper selenide nanoparticles
  • Regulating and controlling method for localized surface plasmons of copper selenide nanoparticles
  • Regulating and controlling method for localized surface plasmons of copper selenide nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] In this embodiment, Cu 2-x The regulation method of Se LSPR refers to the following steps:

[0073] Step A, prepare Cu 2-x Se solution is used as the coating liquid.

[0074] Specifically, (1) Add 32 mL of 10 mg / mL sodium dodecyl sulfate (SDS) solution to 110 mL of water at 30°C and mix well to obtain solution 1; (2) Weigh 44.4 mg of selenium dioxide (SeO 2 ) SeO is obtained after dissolving in 2mL water by ultrasonic 2 Dispersion liquid, and the SeO 2 Add the dispersion to Solution 1 and mix well to obtain Solution 2; (3) Weigh 422.7 mg of ascorbic acid (AA) in 6 mL of water, dissolve it ultrasonically, add it to Solution 2 under magnetic stirring, and react for 10 minutes to obtain a colloid; (4) ) Weigh 563.6mg AA in 8mL water, and weigh 200mg copper sulfate pentahydrate (CuSO 4 ·5H 2 O) Dissolve in 2mL of water, mix by ultrasonic, add to the colloid, stir magnetically for 12h to obtain Cu 2-x Se colloidal solution; (5) Cu 2-x The Se colloidal solution was centrifuged at ...

Embodiment 2

[0086] In the description of Embodiment 2, the similarities to Embodiment 1 will not be repeated here, and only the differences from Embodiment 1 will be described. The difference between Embodiment 2 and Embodiment 1 is:

[0087] In step A, the following method is used to prepare Cu 2-x The Se solution was used as the coating liquid.

[0088] (1) Add 32mL of 10mg / mL SDS solution to 110mL of water at 30°C and mix well to obtain solution 1; (2) Weigh 986.3mg of AA in 14mL of water and dissolve it by ultrasound to obtain solution 2; (3) Add solution 2 to solution 1 and mix well to obtain the first mixed solution; (4) Weigh 200mg CuSO 4 ·5H 2 O was dissolved in 2 mL of water and added to the first mixed solution after being ultrasonically dissolved and mixed to obtain the second mixed solution; (5) Weigh 44.4 mg of SeO 2 Dissolve in 2mL water and obtain SeO after ultrasonic 2 Dispersion liquid, and the SeO 2 The dispersion liquid is added to the second mixed liquid under magnetic stir...

Embodiment 3

[0095] In the description of Embodiment 3, the similarities with Embodiment 1 will not be repeated here, and only the differences from Embodiment 1 will be described. The difference between Example 3 and Example 1 is:

[0096] In step A, the following method is used to prepare Cu 2-x The Se solution was used as the coating liquid.

[0097] (1) Weigh 5.5mg SeO at 30℃ 2 SeO is obtained after dissolving in 0.5mL water by ultrasonic 2 Dispersion liquid, and the SeO 2 The dispersion was added to 8mL of 10mg / mL SDS solution, magnetically stirred to obtain a mixed solution; (2) Weigh 52.8mg AA in 1.5mL of water, dissolve it ultrasonically, add it to the mixed solution, react for 10 minutes to obtain the first colloid; (3) Take 2mL of the first colloid and place it in 1.5mL of 42mg / mL SDS solution, magnetically stir to obtain the second colloid; (4) Weigh 5.5mg of SeO 2 And 52.8mg AA in 3.5mL water respectively, after ultrasonic dissolving, add to the second colloid through a peristaltic p...

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Abstract

The invention discloses a regulating and controlling method for localized surface plasmons of copper selenide nanoparticles. The method comprises the following steps: step 1, a Cu2-xSe solution is prepared to be used as a coating liquid; step 2, an electroconductive substrate is coated by the coating liquid to make the Cu2-xSe adhere to the electroconductive substrate to form a Cu2-xSe film; step3, a three-electrode system is constructed by using the electroconductive substrate having the Cu2-xSe film as a working electrode and a lithium-containing solution as an electrolyte; and step 4, thethree-electrode system is electrically connected to an electrochemical workstation to control deintercalation of lithium ions in the Cu2-xSe and monitor an absorption value of the Cu2-xSe film at 750nm to 1500 nm in situ; and at -1.0 V to -1.2 V, the lithium ions are embedded into the Cu2-xSe, and localized surface plasmon resonance (LSPR) disappears, and at -0.4 V to -0.2 V, the lithium ions aredisembedded from the Cu2-xSe, and the LSPR is recovered. According to the regulating and controlling method provided by the invention, the lithium ions are embedded at a reduction potential, so thata concentration of hole carriers is reduced, and LSPR absorption is reduced until the LSPR disappears; the lithium ions are disembedded at an oxidation potential, so that the concentration of the carriers is increased, and the LSPR is recovered; and therefore, dynamic, precise and reversible regulation and control for the LSPR of the Cu2-xSe are realized.

Description

Technical field [0001] The invention belongs to the field of electrical variable adjustment and control, and in particular, relates to a method for adjusting and controlling local surface plasmons of copper selenide nanoparticles. Background technique [0002] Copper-based chalcogenide Cu 2-x E(E=S,Se,Te), under the disturbance of near-infrared electromagnetic wave, will excite its free hole carriers to oscillate collectively, showing the properties of local surface plasmon (LSPR); based on this, Cu 2-x As a non-precious metal LSPR material, E can be widely used in many fields such as field enhancement spectroscopy, photocatalysis, photoacoustic imaging and photothermal therapy. However, the realization of Cu 2-x The precise dynamic control of E's LSPR enables researchers to manipulate the interaction between near-infrared light and matter on the nanoscale, which is of great value for its related applications. [0003] So far, studies have shown that Cu 2-x In addition to the adjus...

Claims

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Application Information

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IPC IPC(8): C01B19/00B82Y40/00G01N27/416
CPCC01B19/007G01N27/4166C01P2004/04C01P2004/03C01P2006/40C01P2004/64
Inventor 欧玮辉姜江
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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