| 单词 | unit cell |
| 例句 | Last week, a 34-year-old man was found unconscious in a medical unit cell at the jail, where he had been held since 2019. Trump's court time in Fulton County will be quick. Others die waiting 2023-08-15T04:00:00Z Cesium ions and chloride ions touch along the body diagonals of the unit cells. Chemistry 2019-02-14T00:00:00Z This halves the size of the Brillouin zone — a unit cell of the abstract ‘momentum space’ that is used to describe the properties of electrons in semiconductors. Nanostructured alloys light the way to silicon-based photonics 2020-04-07T04:00:00Z The atomic or molecular order in a crystal is defined by the unit cell, which is the smallest repeating unit of the crystal structure. How to make the thinnest possible free-standing sheets of perovskite materials 2019-06-04T04:00:00Z Figure 1 | Two hardening mechanisms in polycrystalline materials. a, The smallest repeating unit of a crystal lattice is called a unit cell. Atomic-scale hardening mechanisms apply on larger scales in ‘architected’ materials 2019-01-15T05:00:00Z In the first step of the multi-step pathway, each unit cell rotated to produce a structure of differently sized squares. Complex mechanical motion guided without external control 2018-09-25T04:00:00Z They can be described by unit cells with either cations at the corners or anions at the corners. Chemistry 2019-02-14T00:00:00Z Plastics, also called polymers, are produced by linking together small building blocks, or unit cells. Plastics Explained, From A to Z 2018-05-16T04:00:00Z The grown film is said to be epitaxial if its unit cells align with the unit cells of the substrate. How to make the thinnest possible free-standing sheets of perovskite materials 2019-06-04T04:00:00Z The researchers then assembled the unit cells in designs that replicated the defects and structures involved in hardening mechanisms in polycrystalline metals. Atomic-scale hardening mechanisms apply on larger scales in ‘architected’ materials 2019-01-15T05:00:00Z The authors observed2 strong insulating behaviour when each unit cell of the synthetic lattice contained four charge carriers, a density that corresponds to complete filling of the bands. Novel electronic states seen in graphene 2018-03-04T05:00:00Z The unit cell consists of lattice points that represent the locations of atoms or ions. Chemistry 2019-02-14T00:00:00Z This measurement provided a well determined unit cell and a phasing model that could be used for a subsequent data set. A low-spin Fe(iii) complex with 100-ps ligand-to-metal charge transfer photoluminescence : Nature : Nature Research 2017-03-28T04:00:00Z The generation of crystal structures involves a low-discrepancy sampling of all structural variables within each space group: unit cell lengths and angles, and molecular positions and orientations within the asymmetric unit. Functional materials discovery using energy–structure–function maps : Nature : Nature Research 2017-03-21T04:00:00Z Studies of the effects of other types of unit cell might open up avenues of research aimed at developing architected materials that combine key features from different biomaterials. Atomic-scale hardening mechanisms apply on larger scales in ‘architected’ materials 2019-01-15T05:00:00Z Even more intriguing is what happens when charge carriers are added to the Mott-insulator states associated with half-full unit cells of the synthetic lattice. Novel electronic states seen in graphene 2018-03-04T05:00:00Z The entire structure then consists of this unit cell repeating in three dimensions, as illustrated in Figure 10.46. Chemistry 2019-02-14T00:00:00Z An inmate paces inside a secured housing unit cell at California State Prison in Corcoran. Peek inside 'the SHU': What it's like for California inmates in solitary confinement 2015-09-01T04:00:00Z A crystal with a thickness of 50 unit cells in the field direction is considered. Addendum: Optical-field-induced current in dielectrics 2014-03-19T18:22:43.387Z We match diffraction data to that computed from an isolated unit cell and ignore the periodicity of the model. [Technical Response] Response to Comment on “The Local Structure of Amorphous Silicon” 2012-12-20T21:25:57.750Z Why, the so-called ‘unit cell’ breathes, digests, and manifests life-functions, and yet it has no lungs, no mouth, no stomach, no organs. Carmen Ariza In a simple cubic lattice, the unit cell that repeats in all directions is a cube defined by the centers of eight atoms, as shown in Figure 10.49. Chemistry 2019-02-14T00:00:00Z Among the unit cells, the various tissues, organs and systems of the body, there is a working harmony. The Next Step A Plan for Economic World Federation Consequently, unit cell axes join points with identical environments. Chemistry 2019-02-14T00:00:00Z There are seven different lattice systems, some of which have more than one type of lattice, for a total of fourteen different unit cells, which have the shapes shown in Figure 10.56. Chemistry 2019-02-14T00:00:00Z Calculate the edge length of the face-centered cubic unit cell and the density of platinum. Chemistry 2019-02-14T00:00:00Z Atoms at adjacent corners of this unit cell contact each other, so the edge length of this cell is equal to two atomic radii, or one atomic diameter. Chemistry 2019-02-14T00:00:00Z The cubic form of zinc sulfide, zinc blende, also crystallizes in an FCC unit cell, as illustrated in Figure 10.61. Chemistry 2019-02-14T00:00:00Z There are four zinc ions and four sulfide ions in the unit cell, giving the empirical formula ZnS. Chemistry 2019-02-14T00:00:00Z There are four calcium ions and eight fluoride ions in a unit cell, giving a calcium:fluorine ratio of 1:2, as required by the chemical formula, CaF2. Chemistry 2019-02-14T00:00:00Z It is important to realize that values for ionic radii calculated from the edge lengths of unit cells depend on numerous assumptions, such as a perfect spherical shape for ions, which are approximations at best. Chemistry 2019-02-14T00:00:00Z A cubic unit cell contains only the parts of these atoms that are within it. Chemistry 2019-02-14T00:00:00Z Let us begin our investigation of crystal lattice structure and unit cells with the most straightforward structure and the most basic unit cell. Chemistry 2019-02-14T00:00:00Z This arrangement is called simple cubic structure, and the unit cell is called the simple cubic unit cell or primitive cubic unit cell. Chemistry 2019-02-14T00:00:00Z The mass of the unit cell can be found by: Chemistry 2019-02-14T00:00:00Z The volume of a Ca unit cell can be found by: Chemistry 2019-02-14T00:00:00Z Since an atom at a corner of a simple cubic unit cell is contained by a total of eight unit cells, only one-eighth of that atom is within a specific unit cell. Chemistry 2019-02-14T00:00:00Z And since each simple cubic unit cell has one atom at each of its eight “corners,” there is atom within one simple cubic unit cell. Chemistry 2019-02-14T00:00:00Z The mass of a Po unit cell can be found by: Chemistry 2019-02-14T00:00:00Z Most metal crystals are one of the four major types of unit cells. Chemistry 2019-02-14T00:00:00Z One cesium ion and one chloride ion are present per unit cell, giving the l:l stoichiometry required by the formula for cesium chloride. Chemistry 2019-02-14T00:00:00Z Since a Po unit cell contains one-eighth of a Po atom at each of its eight corners, a unit cell contains one Po atom. Chemistry 2019-02-14T00:00:00Z The two unit cells are different, but they describe identical structures. Chemistry 2019-02-14T00:00:00Z When an ionic compound is composed of a 1:1 ratio of cations and anions that differ significantly in size, it typically crystallizes with an FCC unit cell, like that shown in Figure 10.60. Chemistry 2019-02-14T00:00:00Z The unit cell contains four sodium ions and four chloride ions, giving the 1:1 stoichiometry required by the formula, NaCl. Chemistry 2019-02-14T00:00:00Z They can be described by FCC unit cells with cations in the octahedral holes. Chemistry 2019-02-14T00:00:00Z The volume of a Po unit cell can be found by: Chemistry 2019-02-14T00:00:00Z The structure of a solid can be described by indicating the size and shape of a unit cell and the contents of the cell. Chemistry 2019-02-14T00:00:00Z The type of structure and dimensions of the unit cell can be determined by X-ray diffraction measurements. Chemistry 2019-02-14T00:00:00Z Describe the crystal structure of Pt, which crystallizes with four equivalent metal atoms in a cubic unit cell. Chemistry 2019-02-14T00:00:00Z Calculate the edge length of the face-centered cubic unit cell and the density of aluminum. Chemistry 2019-02-14T00:00:00Z Some metals crystallize in an arrangement that has a cubic unit cell with atoms at all of the corners and an atom in the center, as shown in Figure 10.51. Chemistry 2019-02-14T00:00:00Z The free space in a metal may be found by subtracting the volume of the atoms in a unit cell from the volume of the cell. Chemistry 2019-02-14T00:00:00Z Rubidium iodide crystallizes with a cubic unit cell that contains iodide ions at the corners and a rubidium ion in the center. Chemistry 2019-02-14T00:00:00Z One of the various manganese oxides crystallizes with a cubic unit cell that contains manganese ions at the corners and in the center. Chemistry 2019-02-14T00:00:00Z Oxide ions are located at the center of each edge of the unit cell. Chemistry 2019-02-14T00:00:00Z Atoms in the corners of a BCC unit cell do not contact each other but contact the atom in the center. Chemistry 2019-02-14T00:00:00Z |
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