来自MoAlB的Al的拓化脱:阶段性蚀刻路径,分层增长结构和二维MBene
Journal of the American Chemical Society
|June 16, 2018
概括
研究人员通过从氧化 (MoAlB) 单晶中脱来实现二维二氧化 (MBene) 的室温合成. 这一过程产生了转移稳定的阶段和一个新的2DMBene单层,为先进材料开辟了道路. 关键词:二维MBene,MoAlB,室温合成,转移稳定的阶段.
科学领域:
- 材料科学
- 固态化学
- 纳米技术
背景情况:
- 耐火材料合成通常需要高温,限制低温结构改造.
- 对于热力学稳定,高温合成材料来说,拓化学转换具有挑战性.
- 访问像MBenes这样的二维 (2D) 材料通常需要复杂的合成路径.
研究的目的:
- 为了研究 (Al) 从 (MoAlB) 单晶体的低温脱.
- 探索转移稳定的Mo-Al-B相互增长阶段和2D二 (MoB) 的形成.
- 通过转稳相工程来证明合成二维MBenes的新途径.
主要方法:
- 单晶MoAlB与氧化物 (NaOH) 的室温反应
- 高分辨率显微镜检查分析结构变化并确定新阶段.
- 脱产品的特征,包括堆叠故障分析.
主要成果:
- 在室温下逐步将Al从MoAlB中脱.
- 形成四个新的转移稳定的Mo-Al-B杂交相 (Mo2AlB2,Mo3Al2B3,Mo4Al3B4,Mo6Al5B6).
- 成功合成一个二维的MoB (MBene) 单层,其中Mo2AlB2被确定为关键前体.
结论:
- 室温脱是一种从MAB阶段合成2DMBenes的可行策略.
- 通过脱工程,可以获得新的二维材料.
- 2D MoB的发现为电子和催化领域的应用提供了新的可能性.
更多相关视频
08:21Aesthetically Enhanced Silica Aerogel Via Incorporation of Laser Etching and Dyes
Published on: March 12, 2021
3.3K
06:46Mouse Fetal Whole Intestine Culture System for Ex Vivo Manipulation of Signaling Pathways and Three-dimensional Live Imaging of Villus Development
Published on: September 4, 2014
15.6K
相关概念视频
Structures of Solids
18.0K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
18.0K
C4 Pathway and CAM
49.3K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
49.3K
Protein and Protein Structure
88.2K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
88.2K
Layers of the Epidermis
8.5K
The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
8.5K
Dimensional Analysis
65.0K
Dimensional analysis, also known as the factor label method, is a versatile approach for mathematical operations. The main principle behind this approach is: the units of quantities must be subjected to the same mathematical operations as their associated numbers. This method can be applied to computations ranging from simple unit conversions to more complex and multi-step calculations involving several different quantities and their units.
Conversion Factors and Dimensional Analysis
The unit...
Conversion Factors and Dimensional Analysis
The unit...
65.0K
Other Glycolytic Pathways
941
The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
941
