CuInS2 Quantum Dot and Polydimethylsiloxane Nanocomposites for All-Optical Ultrasound and Photoacoustic Imaging,Advanced Materials Interfaces

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CuInS2 Quantum Dot and Polydimethylsiloxane Nanocomposites for All-Optical Ultrasound and Photoacoustic Imaging
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2021-09-16 , DOI: 10.1002/admi.202100518
Semyon Bodian _{1,

2,

3} , Richard J Colchester _{1,

2} , Thomas J Macdonald _{3,

4} , Filip Ambroz ₃ , Martha Briceno de Gutierrez ₅ , Sunish J Mathews _{1,

2} , Yu Man Mandy Fong _{1,

2,

3} , Efthymios Maneas _{1,

2} , Kathryn A Welsby ₆ , Ross J Gordon ₅ , Paul Collier ₅ , Edward Z Zhang ₁ , Paul C Beard _{1,

2} , Ivan P Parkin ₃ , Adrien E Desjardins _{1,

2} , Sacha Noimark _{1,

2,

3}

Affiliation

Dual-modality imaging employing complementary modalities, such as all-optical ultrasound and photoacoustic imaging, is emerging as a well-suited technique for guiding minimally invasive surgical procedures. Quantum dots are a promising material for use in these dual-modality imaging devices as they can provide wavelength-selective optical absorption. The first quantum dot nanocomposite engineered for co-registered laser-generated ultrasound and photoacoustic imaging is presented. The nanocomposites developed, comprising CuInS₂ quantum dots and medical-grade polydimethylsiloxane (CIS-PDMS), are applied onto the distal ends of miniature optical fibers. The films exhibit wavelength-selective optical properties, with high optical absorption (> 90%) at 532 nm for ultrasound generation, and low optical absorption (< 5%) at near-infrared wavelengths greater than 700 nm. Under pulsed laser irradiation, the CIS-PDMS films generate ultrasound with pressures exceeding 3.5 MPa, with a corresponding bandwidth of 18 MHz. An ultrasound transducer is fabricated by pairing the coated optical fiber with a Fabry–Pérot (FP) fiber optic sensor. The wavelength-selective nature of the film is exploited to enable co-registered all-optical ultrasound and photoacoustic imaging of an ink-filled tube phantom. This work demonstrates the potential for quantum dots as wavelength-selective absorbers for all-optical ultrasound generation.

中文翻译：

用于全光超声和光声成像的 CuInS2 量子点和聚二甲基硅氧烷纳米复合材料

采用互补模态的双模态成像，例如全光超声和光声成像，正在成为一种非常适合指导微创外科手术的技术。量子点是用于这些双模态成像设备的有前途的材料，因为它们可以提供波长选择性的光学吸收。提出了第一个专为联合配准激光产生超声和光声成像而设计的量子点纳米复合材料。所开发的纳米复合材料由 CuInS ₂量子点和医用级聚二甲基硅氧烷 (CIS-PDMS) 组成，应用于微型光纤的远端。该薄膜表现出波长选择性光学特性，在产生超声波的 532 nm 处具有高光吸收 (> 90%)，在大于 700 nm 的近红外波长处具有低光吸收 (< 5%)。在脉冲激光照射下，CIS-PDMS薄膜产生压力超过3.5 MPa的超声波，相应带宽为18 MHz。通过将涂层光纤与法布里-珀罗 (FP) 光纤传感器配对来制造超声换能器。利用薄膜的波长选择性特性，可以对充满墨水的管体模型进行全光超声和光声成像的联合配准。这项工作展示了量子点作为全光超声产生的波长选择性吸收剂的潜力。

更新日期：2021-10-22

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