# A Versatile Synthesis Approach and Interface Characterization of t‑ZnO@Metal Hydroxide/Oxide Heterostructures

## TL;DR

This paper introduces a new method to create t-ZnO@metal hydroxide/oxide structures and studies their properties for use in sensors and electronics.

## Contribution

A versatile wet chemical synthesis method for t-ZnO@metal hydroxide/oxide heterostructures is developed and characterized.

## Key findings

- t-ZnO cores were uniformly coated with metal hydroxides, forming distinct core–shell architectures.
- Interface characterization revealed structural and chemical properties of the hybrid microstructures.
- t-ZnO structures show potential as templates for synthesizing various metal oxides and hydroxides.

## Abstract

Functional ceramics play a key role in technology, particularly
in piezoelectric sensors and actuators, ferroelectric power generation,
and durable semiconductors used in sensors and memristors. In this
study, we report a versatile wet chemical synthesis approach, converting
the surface of functional tetrapodal zinc oxide (t-ZnO) to common
metal hydroxides. We performed structural, morphological, and interface
characterization and explored the subsequent application of various
t-ZnO@metal hydroxide/oxide core–shell structures. The t-ZnO
core was initially uniformly coated with different metal hydroxides,
forming distinct platelets in a core–shell architecture. Interface
studies were conducted to investigate the chemical, structural, and
morphological properties of these hybrid microstructures using 2D
scanning nano X-ray diffraction (XRD), scanning electron microscopy
(SEM), transmission electron microscopy (TEM), bulk XRD, X-ray photoelectron
spectroscopy (XPS), and Raman spectroscopy. Our findings highlight
the potential of exceptional t-ZnO structures as versatile templates,
offering their morphology for the synthesis of derived oxides and
hydroxides of many other elements while leveraging their structural
advantages.