Results 11 to 20 of about 5,382 (129)
Visible‐Light‐Excited Optical Thermometry in Ca3Sc2Si3O12: Er3+ via an Efficient Eu2+ Bridge
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Er3+ ions are promising for optical thermometry due to their thermally coupled levels. However, their parity‐forbidden transitions result in weak and narrowband absorption, which restricts excitation to infrared lasers (e.g., 808, 980, or 1550 nm). Moreover, the single emission center inherently limits temperature sensitivity. In this work, we
Yi Liu +6 more
wiley +1 more source
四川大学学报. 自然科学版, 2009 采用激光辐照的方法在硅锗薄膜样品表面生成微米级小孔,用高精度扫描电镜观察孔内结构,发现片状的纳米结构.用荧光光谱仪测其光致荧光谱,在705nm 处出现较强的光致荧光谱(PL).对片状结构在800℃下进行退火20min 后,其 PL 光谱明显蓝移至575nm.退火40min 后,在725nm 处有较宽的 PL 光谱,同时,在606nm 处有一尖锐的 PL 光谱.利用量子受限和纳晶与氧化物的界面态综合模型解释 PL 光谱的产生.
吴克跃, 宋军, 吴兴举
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Precise and controllable laser wavelength modulation over a broad spectral range in nanoscale devices is pivotal for advancing next‐generation optoelectronic technologies. Herein, we synthesized high‐quality CsPbBr3 nanowires (NWs) via the anti‐solvent method and constructed a CsPbBr3/SiO2/Ag hybrid structure, demonstrating both photonic and ...
Yizun Zhou +10 more
wiley +1 more source
四川大学学报. 自然科学版, 2009 研究了曲酸对胰蛋白酶活性的影响,以及曲酸处理的胰蛋白酶的紫外光谱、荧光淬灭光谱、同步荧光光谱和三维荧光光谱.结果显示曲酸对胰蛋白酶具有激活作用;二者相互作用后,曲酸可以使胰蛋白酶的紫外吸收强度增强,但却使得蛋白内源荧光强度下降.Stern-Volmer作图显示了曲酸对胰蛋白酶的荧光淬灭为静态淬灭作用,求出二者的结合常数K为5.30×10～7L/mol,结合位点n为1.50;用同步荧光光谱和三维荧光光谱探讨了曲酸对胰蛋白酶构象的影响.
李黎 +5 more
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Enhanced Dual‐Modality CT Imaging for Evaluating Hematogenous Metastasis During Photothermal Therapy
Rare Metals, Volume 45, Issue 7, July 2026.Dual‐modality computed tomography (CT) nanoprobes, BPP, are developed for real‐time microscopic monitoring of microvessel morphology and vascular permeability to provide predictive insights into cancer progression and metastasis. ABSTRACT Dynamic assessment of hematogenous metastasis is crucial for the tumor during photothermal therapy.
Yanhong Sun +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Germanium is a critical dispersed metal, yet sustainable recovery from dilute solutions is limited by sorbents that are difficult to regenerate and operate in continuous mode. Here, we fabricate a regenerable 3D‐printed hydrogel monolith (3D‐ATO‐GS) by integrating hydroxyl‐rich amorphous TiO2 nanoparticles into an alginate/gelatin scaffold ...
Wenhuan Guo +6 more
wiley +1 more source
四川大学学报. 自然科学版, 2005 利用合成蛋白石模板、填充溶胶前驱体、烧结移除模板的方法,制备BaTi O3∶Tm3+的反蛋白石结构.根据实验测量的反射光谱与650nm激光光源激发下的上转换荧光光谱,得到了反蛋白石结构的光子带隙位置以及上转换光谱.由于带隙位置与激发光源位置的重合,与粉末样品的上转换光谱相比,反蛋白石的光谱强度降低,出现了峰位展宽,从而也为光子带隙对于特定电磁波的抑制提供了明显的证据.
曹婧 +5 more
doaj
Dianci bileiqi, 2023 目前传统的高光谱污秽检测主要针对人工涂污样本。而运行复合绝缘子由于结构和自然积污复杂、基材浸污严重，难以运用其方法进行污秽检测。因此搭建了适用于绝缘子污秽检测的高光谱拍摄平台，并提出了一种基于高光谱的运行复合绝缘子污秽检测技术。首先，针对绝缘子光谱特性，提出了一种基于噪声学习的一维卷积降噪自动编码器(1D-RDCAE)高光谱数据转换方法，消除不同拍摄情况导致的谱线偏移现象。其次通过核主成分(KPCA)提取不同污秽程度的光谱特征；分别建立基于线性判别算法(LDA)、BP神经网络(BPNN)以及极限学习机 ...
马御棠 +5 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Light‐activated gas sensors hold significant potential in environmental monitoring and smart Internet of Things (IoT) owing to their advantage in room temperature operation. Nevertheless, due to a narrow light absorption range, high photocarrier recombination rate, and weak redox activity of the sensing material, the performance enhancement of
Jinyong Hu +5 more
wiley +1 more source