Porous single-crystal diamond

Porous diamonds have unique application prospects due to their flexible surface functionalities, high surface-area-to-volume ratio and high self-sharpening ability. Porous diamonds are usually prepared through microwave plasma chemical vapor deposition (MPCVD) techniques or through etching by transition metals, which are expensive and inefficient. Here, we report a simple and efficient method to grow large millimetre-scale porous single-crystal...