Overview
Gold nanoparticles (AuNPs) are nanoscale particles of gold with diameters typically between 1 and 100 nanometers. Their unique properties arise from quantum effects and high surface-area-to-volume ratios, distinguishing them from bulk gold. AuNPs are often stabilized with coatings such as citrate, polymers, or biomolecules to prevent aggregation. These particles are widely studied due to their tunable optical properties, particularly surface plasmon resonance (SPR), which gives them vivid colors in solution. Their biocompatibility and ease of functionalization make them valuable in medical and technological applications.
Physical and Chemical Properties
Gold nanoparticles exhibit distinct physical and chemical properties due to their nanoscale dimensions. Their optical properties, such as SPR, depend on particle size, shape, and surrounding medium. Smaller particles (e.g., 10 nm) appear red, while larger ones (e.g., 100 nm) may appear purple or blue. Chemically, AuNPs are inert in their pure form but can be functionalized with thiols, amines, or other ligands for specific applications. Their catalytic activity is enhanced at the nanoscale, making them useful in chemical reactions like CO oxidation and hydrogenation.
Main Applications
In biomedicine, AuNPs are used for targeted drug delivery, cancer therapy (photothermal ablation), and diagnostic assays (e.g., lateral flow tests like pregnancy tests). Their SPR properties enable sensitive detection in biosensors. In electronics, AuNPs serve as conductive inks for flexible circuits and as catalysts for growing nanowires. They also play roles in environmental applications, such as water purification and pollutant detection.
Safety and Storage
Gold nanoparticles are generally considered low-toxicity materials, but precautions are needed when handling them as powders or aerosols. Uncoated AuNPs may aggregate or lose stability under improper conditions. Storage requires protection from light and extreme temperatures. Colloidal suspensions should be kept at stable pH levels and may require gentle agitation before use to ensure uniformity.
B2B Procurement Guide
When procuring gold nanoparticles, key specifications include particle size (e.g., 5 nm, 20 nm), concentration (OD or mg/mL), surface functionalization (e.g., PEG, citrate), and purity (e.g., >95%). Biomedical applications demand endotoxin-free and sterile options. Suppliers should provide characterization data (TEM, DLS, UV-Vis spectra) and comply with ISO or GMP standards for critical uses. Bulk orders may qualify for discounts, but shelf-life constraints should be considered.
Related Manufacturers
- 主营：[]
- 主营：单层mbene、陶瓷材料、mab相材料、2d碳化钒、免疫因子纳米载体服务、mbene前驱体、ti3c2tx柔性膜
- 主营：活性脂、三苯胺、mof材料、金纳米粒子单层膜、聚乙二醇、海藻酸钠、聚苯乙烯、蛋白交联剂、琥珀酰亚胺酯、月桂酸甘油酯、二元醛基cof单体
- 主营：聚乙二醇PEG衍生物、嵌段聚合物、荧光染料、上转换纳米粒子、纳米材料、金纳米粒、银纳米粒、二氧化硅、四氧化三铁、聚苯乙烯
- 主营：三角片、麦芽糖、羟丙基、金纳米、氮化钛、tio2纳米、pd纳米笼、纳米复合、磁性纳米、硅纳米线、包硅纳米、硅纳米管、纳米粒子、ito薄膜、碳粉tio2、修饰tio2、水溶伊红、蛋白芯片、包硅金银、螯合树脂、油溶性银、复合材料、薄膜定制
- 主营：嵌段共聚物、合成磷脂、荧光染料、点击化学、PEG、量子点
- 主营：生物素、马来酰亚胺、叶酸peg巯基、聚乙二醇马来、聚乙二醇叠氮
- 主营：磁性微球、聚苯乙烯微球、荧光微球、金纳米颗粒、银纳米颗粒、纳米银粉、纳米铂粉、金纳米棒、金纳米粒子、磁性纳米颗粒、二氧化硅微球、纳米铂金溶液、纳米磁珠、纳米金溶液、聚乳酸微球、聚丙烯微球、聚乙烯微球、羧基磁珠、氨基磁珠、海藻酸钠微球、聚氯乙烯微球、pmma微球
- 主营：洁净室、卤素灯、led光源、固化装置、金属卤化物、照射模块、实体显微、混合光源、点灯设备、单元设备、高亮度led、光源模块、光源设备、照明设备、精密光度计、监视器设备、表面检查灯、二维色彩计、可变型光源、卤素检查灯、照明系统设备、镜面反射率计、便携型光度计、高照度手电筒、红外线加热器
- 主营：聚苯乙烯微球、荧光微球、聚丙烯微球、二氧化硅微球、纳米磁珠、磁性纳米粒子、金纳米颗粒、银纳米颗粒、纳米银粉、纳米铂金溶液、纳米银线、银纳米线、金纳米粒子、纳米金溶液、聚乙烯微球、海藻酸钠微球、量子点微球、量子点荧光微球、磁性荧光微球、聚氯乙烯微球、聚乳酸微球、聚四氟乙烯微球
- 主营：碳材料、c60粉体、cotg昂星、氧化石墨烯、氟化石墨烯、双层昂星、分析仪bet、cvd石墨烯、单层昂星、3d多层独立、电位分析仪、富勒醇昂星、双层石墨烯、石墨烯昂星、油橄榄油荷、石墨烯粉体、荧光光谱仪、工业熔喷布、石墨烯薄膜、石墨烯浆料、水分测定仪、单层石墨烯、辅助激光解、水凝胶原液、漫反射测试昂