别名: 纳米金；纳米金粒子；金纳米颗粒；纳米金溶液 金纳米粒子 纳米金溶液（国产） 5nm-400nm Au nanorods, Gold nanorod 金纳米棒吸收波长从550nm 到900nm ，溶剂为水。常用相粒径10nm 25nm 研究领域: 免疫学、信号转导 Introduction 根据不同用途，对纳米金粒子的粒径和缓冲液有特殊要求的请详询。 纳米金粒子粒径规格：5nm-400nm 金纳米棒规格： 20nm-200nm粒径 其他规格 请详询 sigma原装进口货期2-4周，。 Colloidial gold nanoparticles have been utilized for centuries by artists due to the vibrant colors produced by their interaction with visible light. More recently, these unique optical-electronics properties have been researched and utilized in high technology applications such as organic photovoltaics, sensory probes, therapeutic agents, drug delivery in biological and medical applications, electronic conductors and catalysis. The optical and electronic properties of gold nanoparticles are tunable by changing the size, shape, surface chemistry, or aggregation state. Optical & Electronics Properties of Gold Nanoparticles Gold nanoparticles interaction with light is strongly dictated by their environment, size and physical dimensions. Oscillating electric fields of a light ray propagating near a colloidal nanoparticle interact with the free electrons causing a concerted oscillation of electron charge that is in resonance with the frequency of visible light. These resonant oscillations are known as surface plasmons. For small (~30nm) monodisperse gold nanoparticles the surface plasmon resonance phenomona causes an absorption of light in the blue-green portion of the spectrum (~450 nm) while red light (~700 nm) is reflected, yielding a rich red color. As particle size increases, the wavelength of surface plasmon resonance related absorption shifts to longer, redder wavelengths. Red light is then absorbed, and blue light is reflected, yielding solutions with a pale blue or purple color (Figure 1). As particle size continues to increase toward the bulk limit, surface plasmon resonance wavelengths move into the IR portion of the spectrum and most visible wavelengths are reflected, giving the nanoparticles clear or translucent color. The surface plasmon resonance can be tuned by varying the size or shape of the nanoparticles, leading to particles with tailored optical properties for different applications. 储存: 4℃