强烈的双折 pb3o2cl2 纳米带
Michael B Sigman1, Brian A Korgel
1Department of Chemical Engineering, Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712-1062, USA.
Journal of the American Chemical Society
|July 14, 2005
概括
合成的氧化 (Pb3O2Cl2) 纳米带由于其纳米尺寸和晶体结构而显著增强了双折. 这一发现为新型光学材料和应用提供了潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 晶体学 晶体学是指结晶学.
背景情况:
- 正方体Pb3O2Cl2,也称为男丁石,具有异构型的晶体结构,导致自然的双重折射.
- 研究纳米材料的光学特性对于开发先进光学设备至关重要.
研究的目的:
- 通过无溶剂热解法合成奥托伦比Pb3O2Cl2纳米带.
- 描述合成的纳米带的晶体结构和光学特性,特别是双折度.
- 研究纳米尺寸和晶体定向对双折射的影响.
主要方法:
- 单源前体的无溶剂热解在封闭配体的存在下.
- 合成具有控制尺寸 (微米长度,几十纳米宽度) 的Pb3O2Cl2纳米带.
- 使用电子显微镜和衍射技术对晶体结构和优选[010]延长的描述.
- 光学表征来测量双折射,比较纳米带的特性与散装材料和天然矿物质.
主要成果:
- 一个单晶或多合Pb3O2Cl2纳米带的成功合成.
- 纳米带在[010]晶体学方向上表现出偏好的延伸.
- 与散装Pb3O2Cl2.2相比,纳米带的双断率大约增加了一个数量级.
- 增强的双折度超过了常见的双折矿物质,如CaCO3和TiO2.
结论:
- 纳米尺度形态和Pb3O2Cl2纳米带的异型晶体结构导致显著增强的光学双折射.
- 偏好的[010]延长在放大观测到的双断率方面发挥着关键作用.
- 这些发现突显了Pb3O2Cl2纳米带作为光学应用的高性能双折射纳米材料的潜力.
相关概念视频
Molecular Shape and Polarity
Dipole Moment of a Molecule
Hybridization of Atomic Orbitals I
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Chemical Bonds
Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons from...


