“…In this work we demonstrate the fabrication of hollow metal nanoparticle layers by galvanic replacement in Ag island films deposited on glass and silicon substrates. Metal islands films are appealing building blocks for cost-efficient and large-area production of plasmonic devices since they can be obtained by well-established thin film techniques and their optical properties can be broadly tuned by adjusting the fabrication conditions [24,25]. The characteristic large nanoparticle density and small interparticle distance makes these films efficient plasmonic sensors [26,27].…”