Gel-incorporated single-crystals provide unique combinational properties of long-range order and composite structures,which is desired for semiconducting and conducting materials.However,the reported gel-incorporated single-crystals are limited to insulating crystals.Here,we examine crystals of two typical semiconductors,lead sulfide(PbS) and lead iodide(Pbl_2),grown from both silica gels and agarose gels.In all the four crystal-gel pairs,single-crystals of the cubic phase of PbS and the hexagonal phase of Pbl_2 were obtained according to the X-ray diffraction analysis.Dissolution of the gel-grown crystals exposed insoluble materials with the shape similar to the original crystals,indicative of gelincorporation inside the crystals.As such,this work creates a facile strategy to construct 3D heterostructures inside semiconducting single-crystals without destroying their long-range order.
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