随着能源危机的日益加剧，提高太阳能的利用效率能够有效缓解全球能源危机。基于金属纳米颗粒的等离激元纳米流体能显著提高工质对太阳能的吸收和光热转换效率。但由于其可见光波段等离激元频率较难有效调控至近红外波段而制约其应用前景。因此，开发频率可调的新型等离激元纳米流体已成为新的挑战和机遇。基于近红外波段等离激元频率可调的LaB6纳米颗粒，构建新型等离激元纳米流体，有望成为太阳能光热转换的理想体系。本项目旨在基于LaB6纳米结构的可控制备，系统研究太阳辐射下新型等离激元纳米流体的光热转换微观机制，阐明等离激元共振效应和表面等离激元响应等，揭示材料组分、纳米结构的尺寸和形貌、周围介电环境等对光吸收辐射的影响，从而实现纳米结构的光热转换效率的有效调控。在此基础上开发光热转换效率高、可调控的新型等离激元纳米流体。

With the increasingly aggravation of energy crisis, improving the utilization efficiency of solar energy can effectively relive the global energy issue. The absorption and conversion of working fluid can be enhanced by plasmonic nanofluids based on metal nanostructures. However, their potential applications will be restricted since it is difficult to control their surface plasmon resonance frequencies ranging from the visible to near-infrared regions effectively. Therefore, developing the novel nanofluids based on plasmonic nanostructures with tunable surface plasmon resonance frequencies in the near-infrared regions have become challenges and opportunities for future solar technology. Novel plasmonic nanofluids based on LaB6 nanostructures with tunable surface plasmon resonance frequencies in the near-infrared regions are expected to be the ideal system for solar thermal conversion. In this research proposal, based on the controllable synthesis of LaB6 nanostructures, we aim to study solar thermal conversion mechanism of novel plasmonic nanofluids; to clarify surface plasmon resonance and surface plasmon response; to elucidate the effect of composition, size and morphology, surrounding dielectric environment of nanostructures on solar absorption; and then to realize effective regulation on solar thermal conversion of nanostructures based on LaB6. Ultimately, we hope to put forward the development of novel plasmonic nanofluids with high efficiency and controllable solar thermal conversion.