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A photoconductive semiconductor switch (PCSS) based on an individual ZnS nanobelt (NB) was investigated. Under ultraviolet light (280 nm), the current-voltage curve shows that this PCSS is of high photosensitivity (similar to 10(4)), and the response time spectrum shows that this PCSS has a fast response (typical rise time 0.07 s and decay time 0.12 s) and a high-voltage response (6.7 V). Oxygen chemisorption is responsible for the improved photoconductive properties. This PCSS is a promising candidate for future integration. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.