请翻译：The fabrication process of inverted pyramids on Si surface involved two steps, i.e., diamond tip indentation and selective etching in HF/ HNO3 mixtures. Consider the fabrication process for the inverted triangular pyramids as an example, as demonstrated in Fig. 1a. First, a Berkovich diamond indenter was used for conducting indentation process on an in-situ nanomechanical test system (TI750, Hysitron Inc., USA). Then, the Si wafers with indents were immersed in a mixture of HF and HNO3 solution. As a result, the depth of the indent rapidly increased from ~ 30 to 360 nm after the etching in HF/HNO3 mixtures for 10 s, forming inverted pyramids from indented regions in situ. To demonstrate fabrication flexibility of inverted Si architecture produced by the proposed selective etching, indentation experiments were carried out using a Vickers indenter

用Berkovich金刚石入射器在原位纳米力学测试系统（TI750，Hysitron Inc.，美国）上进行入射过程，然后将入射后的硅片浸入HF和HNO3混合液中。结果，在HF/HNO3混合液中腐蚀10 s后，入射处的深度会从~ 30 nm迅速增加到360 nm，形成入射处的倒三角形金字塔。为了证明所提出的选择性腐蚀制备的倒置Si结构的灵活性，使用Vickers入射器进行了入射实验。

相关问题

whats the crystall structure difference of SiGe fin and Si fin

The crystalline structure difference between SiGe fin and Si fin is that SiGe fin has a lattice structure that is different from pure Si. SiGe is a compound semiconductor material that is made by combining silicon (Si) and germanium (Ge) atoms. The addition of Ge atoms changes the lattice structure of the material and provides additional degrees of freedom in the design of semiconductor devices. Si fin has a pure silicon lattice structure that is commonly used in the fabrication of transistors and other electronic devices.

英语翻译：Bioorthogonal catalysis broadens the functional possibilities of intracellular chemistry. Effective delivery and regulation of synthetic catalytic systems in cells are challenging due to the complex intracellular environment and catalyst instability. Here, we report the fabrication of protein-sized bioorthogonal nanozymes through the encapsulation of hydrophobic transition metal catalysts into the monolayer of water-soluble gold nanoparticles. The activity of these catalysts can be reversibly controlled by binding a supramolecular cucurbit[7]uril ‘gate-keeper’ onto the monolayer surface, providing a biomimetic control mechanism that mimics the allosteric regulation of enzymes. The potential of this gated nanozyme for use in imaging and therapeutic applications was demonstrated through triggered cleavage of allylcarbamates for pro-fluorophore activation and propargyl groups for prodrug activation inside living cells.

生物正交催化拓宽了细胞内化学的功能可能性。由于细胞内环境复杂和催化剂不稳定性，合成催化系统的有效传递和调控是具有挑战性的。在这里，我们报告了通过将疏水性过渡金属催化剂封装到水溶性金纳米颗粒的单层中，制备蛋白质大小的生物正交纳米酶。这些催化剂的活性可以通过结合超分子南瓜籽[7]尿苷“门卫”到单层表面来可逆地控制，提供了模仿酶的全新调控机制。通过在活细胞内触发性地剪切烯丙基氨基甲酸酯以激活前荧光剂和丙烯基羟基草酸酯以激活前药物，展示了这种门控纳米酶在成像和治疗应用中的潜力。