Motivated by its high toxicity and presence on many industrial processes, in this work, a hydrogen sulphide (H₂S) gas detector was developed. The construction of the device was accomplished by taking advantage of both silica optical fiber and the potentialities of gold nanoparticles, where the physics for the plasmon resonance on localized surface are exploited. The localized surface plasmon resonance occurs in gold nanoparticles and has strong influence when the free electrons of gold suffer external perturbation. In this case, strong bonding energy between the gold element and sulfur was the main basis for the operation principle of the developed colorimetric detector. In the process of nanoparticles adhesion, polyvinyl alcohol was used on the interface between the fiber and the nanoparticles. The developed detector has the ability of detecting H₂S levels in the range of 0.4 to 2.0 ppm, at room temperature. Different experiments were carried out to verify the behavior of the nanoparticle concentration at the detection limit of the gas. Thus, the proposed detector has many applications in different industrial processes and environments considering the numerous accidents caused by H₂S inhalation with fatal victims already registered around the world.

由于其高毒性和在许多工业过程中的存在，在这项工作中，硫化氢（H ₂S）气体检测仪的研制。通过利用二氧化硅光纤和金纳米粒子的潜力来完成设备的构造，其中利用了局部表面上的等离子体激元共振的物理学。局部表面等离子体激元共振发生在金纳米粒子中，当金的自由电子受到外部扰动时具有强烈的影响。在这种情况下，金元素与硫之间的强键合能是开发的比色检测器工作原理的主要基础。在纳米颗粒粘附的过程中，在纤维和纳米颗粒之间的界面上使用了聚乙烯醇。研发的检测器具有检测H ₂的能力在室温下，S含量在0.4至2.0 ppm的范围内。进行了不同的实验，以验证纳米粒子浓度在气体检测极限下的行为。因此，考虑到由H ₂ S吸入引起的众多事故，全世界已经登记的致命受害者，提出的探测器在不同的工业过程和环境中具有许多应用。