【摘要】：本文對有機染料羅丹明B(RhB)的熒光光譜受溫度、應力以及pH值等物理或化學量的影響進行了研究。實驗采用波長為405nm的激光激發(fā)RhB/H610膠黏劑復合材料或RhB水溶液,得到其熒光發(fā)射譜,用譜峰頻移及新型表征方法"譜帶重心頻移法"分析了環(huán)境參數(shù)對譜帶位置的影響,并通過線性擬合得到了RhB熒光譜帶重心λ_B傳感溫度、壓應力以及pH值的傳感方程。結果表明,譜帶重心頻移法有效抑制了光強漲落的白噪聲,能夠顯著提高傳感的精度和穩(wěn)定性。在測量范圍中間值附近,重心法對溫度、壓應力以及pH值傳感的相對靈敏度分別為0.026%/℃,0.09%/MPa和0.34%。由于RhB具有很高的發(fā)光效率和優(yōu)異的生物相容性,因此基于RhB熒光的傳感方法在生物體系的檢測表征方面具有較高的應用價值。
[Abstract]:The effects of temperature, stress and pH value on the fluorescence spectra of Rhodamine B (RhB) have been studied in this paper. The fluorescence emission spectra of RhB/H610 adhesive composites or RhB aqueous solution excited by laser at wavelength of 405nm were obtained. The influence of environmental parameters on the band position was analyzed by means of spectral peak frequency shift and a new characterization method, "Spectral Band Gravity shift method". The sensing equations of temperature, compressive stress and pH value of the center of gravity 位 _ B of RhB fluorescence band are obtained by linear fitting. The results show that the spectral band barycenter frequency shift method can effectively suppress the white noise caused by the fluctuation of light intensity, and can significantly improve the accuracy and stability of the sensor. The relative sensitivities of barycenter method to temperature, compressive stress and pH are 0.026 / 鈩，

本文編號：2296572