可调节的激发动态,光衰变和微观结构分析Eu2O3,Nb2O5纳米颗粒合双裂质液晶
Santosh Nandi1, Vinayak Mahadev Adimule2, Rangappa Keri3
1Universidad Tecnologica Metropolitana, Av. José Pedro Alessandri, Ñuñoa , 1242, CHILE.
概括
这项研究合成了新型的液晶纳米复合材料 (LCNCs),添加了欧氧化物 (Eu2O3) 和氧化物 (Nb2O5) 的纳米粒子. 这些材料具有有前途的光发光特性,可用于先进的光电子和光子应用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 光电学是指光电子产品.
背景情况:
- 液晶纳米复合材料 (LCNC) 提供可调节的光学和电子性能.
- 亚衍生物是功能材料中的关键成分.
- 用金属氧化物纳米颗粒进行兴奋剂可以增强材料特性.
研究的目的:
- 为了合成和描述用Eu2O3和Nb2O5纳米粒子合的新型LCNC.
- 研究这些纳米复合材料的结构,光学和光发光特性.
- 探索它们在光电子和光子学中的潜在应用.
主要方法:
- 亚博衍生物 (3a,3b) 的合成及其用Eu2O3和Nb2O5NP进行注.
- 用粉状X射线衍射 (PXRD) 来进行结构确认.
- 场发射扫描电子显微镜 (FESEM) 用于形态分析.
- 紫外线可见光谱仪用于光学带间隙的确定.
- 极化光学显微镜 (POM) 用于双折纹理观测.
- 室温光发光 (RTPL) 和稳定状态光发光 (SSPL) 用于排放研究.
- 光衰变和量子产量测量.
- 极化研究以分析排放特征.
主要成果:
- PXRD证实了Eu2O3和Nb2O5NP的纯度和成功集成.
- FESEM揭示了一种不均的虫/片状形态与聚合.
- 紫外线-Vis研究显示光带间隙和宽吸收带的轻微变化.
- POM证实了LCNCs的双断层纹理.
- 在各种激发下,RTPL和SSPL表现出明显的发光,具有多种发射颜色 (紫,蓝,绿,黄色,色,红).
- 观察到大斯托克斯转移和FWHM,归因于额外的能量水平.
- 光衰变时间从纳秒到纳秒不等.
- 量子产量随着激发波长而变化.
- 极化研究显示出以缺陷为中心的排放频段.
结论:
- 合成的3a@Eu2O3和3b@Nb2O5LCNC具有独特的结构和光发光特性.
- 观测到的发光特性,包括大的斯托克斯转移和多样化的发射颜色,是有希望的.
- 这些新型纳米复合材料适用于先进的光电子,光子和发光器件应用.
相关概念视频
Radioactive Decay and Radiometric Dating
37.2K
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
37.2K
Nonsense-mediated mRNA Decay
11.9K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
11.9K
Nonsense-mediated mRNA Decay
3.4K
3.4K
Interference and Decay
476
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
476
Ionic Crystal Structures
17.1K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
17.1K
Resting Potential Decay
6.5K
The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
At rest, the K+ is the main ion that moves across the membrane...
At rest, the K+ is the main ion that moves across the membrane...
6.5K


