《自然》20241219出版一周论文导读

 

编译|李言

Nature, 19 December 2024, Volume 636 Issue 8043

《自然》2024年12月19日，第636卷，8043期

材料科学Material Sciences

Growth-based monolithic 3D integration of single-crystal 2D semiconductors

基于生长的单晶二维半导体单片三维集成

▲ 作者：Ki Seok Kim, Seunghwan Seo et al.

▲链接：

https://www.nature.com/articles/s41586-024-08236-9

▲摘要：

在此，我们提出了一种在非晶态和多晶表面上生长单晶通道材料的方法。这些材料特别由过渡金属二硫化物组成，在足够低的温度下进行，以保护底层的电子元件。

通过这种改良后的技术，我们展示了垂直单晶逻辑晶体管阵列的无缝单体集成。这一成果导致了由生长的单晶通道组成的前所未有的垂直互补金属氧化物半导体（CMOS）阵列的发展。最终，这一成果为以单晶形式的各种电子硬件的M3D集成提供了机会。

▲ Abstract：

Here we present a method for growing single-crystalline channel materials, specifically composed of transition metal dichalcogenides, on amorphous and polycrystalline surfaces at temperatures low enough to preserve the underlying electronic components. Building on this developed technique, we demonstrate the seamless monolithic integration of vertical single-crystalline logic transistor arrays. This accomplishment leads to the development of unprecedented vertical complementary metal oxide semiconductor (CMOS) arrays composed of grown single-crystalline channels. Ultimately, this achievement provides opportunities for M3D integration of various electronic hardware in the form of single crystals.

天文学Astronomy

Tidally driven remelting around 4.35 billion years ago indicates the Moon is old

435万年前的潮汐驱动重融显示月球非常古老

▲ 作者：Francis Nimmo, Thorsten Kleine & Alessandro Morbidelli

▲链接：

https://www.nature.com/articles/s41586-024-08231-0

▲摘要：

在此，我们认为月球岩石中频繁出现的年龄4.35-Ga和锆石年龄的峰值大约同时出现，表明月球轨道演化驱动的重熔事件，而不是月球岩浆洋（LMO）的原始结晶。

我们的结果展示了在通过拉普拉斯平面跃迁的过程中，月球经历了足够的潮汐加热和融化，导致大多数月球样品的形成年龄被重置，同时保留了早期冻结的形状和罕见的早期形成的锆石。这种模式调和了LMO结晶时间预计上存在的差异，并允许月球在太阳系形成的几千万年内形成，与类地行星形成的动力学模型一致。

月球的重熔也解释了月球撞击盆地的次数比预期的要少，并允许在月球形成后被吸积到月球上的星子中的金属被转移到月球核心，这解释了月球与地球相比明显缺乏这些物质的原因。

▲ Abstract：

Here we argue that the frequent occurrence of approximately 4.35-Ga ages among lunar rocks and a spike in zircon ages at about the same time is indicative of a remelting event driven by the Moon’s orbital evolution rather than the original crystallization of the LMO. We show that during passage through the Laplace plane transition, the Moon experienced sufficient tidal heating and melting to reset the formation ages of most lunar samples, while retaining an earlier frozen-in shape and rare, earlier-formed zircons. This paradigm reconciles existing discrepancies in estimates for the crystallization time of the LMO, and permits formation of the Moon within a few tens of million years of Solar System formation, consistent with dynamical models of terrestrial planet formation. Remelting of the Moon also explains the lower number of lunar impact basins than expected, and allows metal from planetesimals accreted to the Moon after its formation to be removed to the lunar core, explaining the apparent deficit of such materials in the Moon compared with Earth.

A dormant overmassive black hole in the early Universe

早期宇宙中一个休眠的超大质量黑洞

▲ 作者：Ignas Juod?balis, Roberto Maiolino et al.

▲链接：

https://www.nature.com/articles/s41586-024-08210-5

▲摘要：

在此，我们报告了JADES巡天中探测到的z=6.68星系的Hα宽发射线。该星系追踪到一个质量约为4?×?10