PbTiO3 nanoplates were synthesized by a two-step hydrothermal method, and ammonia solution was chosen as pH-adjusting agent. The effect of concentration in the second-step precursors, Pb-Ti feedstock concentration, reaction temperature, time on crystallization morphologies nanocrystals investigated. typical single-crystal with stair-like edge formed, nominal first-step precursors 8.8 mol/L, 4.4...

Crystalline oxide films are important components in a wide array of electronic and optical devices, and their study and manufacture involve major aspects of current science and technology. A plethora of methods, such as sputtering, chemical vapor deposition, pulsed laser deposition, and sol-gel, are commonly used to deposit these films, and many new techniques are being developed (1). In each o...

We present a high-resolution in situ study of oxygen and boron isotopes measured tourmaline from the world-class San Rafael Sn (–Cu) deposit (Central Andean tin belt, Peru) aiming to trace major fluid processes at magmatic-hydrothermal transition leading precipitation cassiterite. Our results show that late-magmatic pre-ore hydrothermal has similar values δ18O (from 10.6‰ 14.1‰) δ11B −11.5‰ −6....

A novel method to generate an aluminum-based MOF material named as MIL-121 was investigated. MIL-121, [Al(OH)(H2BTEC)·(H2O)]n is a prototypal aluminum with 1,2,4,5-benzenetetracarboxylic acid (BTEC) linkers, which normally produced by the hydrothermal method. Different from method, developed does not involve high temperature and pressure, instead traditional cooling crystallization at ambient p...

Hydrothermal systems have prevailed throughout geological history on earth, and ancient ARCHAEAN hydrothermal deposits could provide clues to understanding earth's earliest biosphere. Modern hydrothermal systems support a plethora of microorganisms and macroorganisms, and provide good comparisons for paleontological interpretation of ancient hydrothermal systems. However, all of the microfossil...

In the past few decades, chemosynthetic ecosystems at deep-sea hydrothermal vents have received attention as plausible analogues to the early ecosystems of Earth, as well as to extraterrestrial ecosystems. These ecosystems are sustained by chemical energy obtained from inorganic redox substances (e.g., H2S, CO2, H2, CH4, and O2) in hydrothermal fluids and ambient seawater. The chemical and isot...

Introduction: In the Noachian, Mars’ crust was deeply affected by impact crater gardening [1], and subsequent hydrothermal alteration. While water was present in the Martian crust [2,3], frequent impacts [4,5] provided prominent heat sources that drove hydrothermal systems. Those systems were scattered randomly over the planet’s surface and variable in size, but generally spanned the diameter o...