Overview
Gold particles, also known as gold nanoparticles or colloidal gold, are finely divided metallic gold with sizes ranging from 1 to 100 nanometers. They exhibit unique optical, electronic, and catalytic properties due to their high surface-area-to-volume ratio and quantum effects. These particles are synthesized through chemical reduction, laser ablation, or biological methods, with precise control over size and shape. Gold particles have been used for centuries in decorative arts, but modern applications leverage their nanoscale properties. Their biocompatibility and ease of functionalization make them ideal for biomedical uses, while their conductivity and stability are valued in electronics and catalysis.
Physical and Chemical Properties
Gold particles retain the intrinsic properties of bulk gold, including excellent electrical and thermal conductivity, corrosion resistance, and malleability. However, their nanoscale dimensions introduce surface plasmon resonance (SPR), which gives colloidal gold its characteristic red or purple color depending on particle size. Chemically, gold particles are inert under most conditions but can catalyze reactions such as oxidation or reduction when functionalized with ligands. Their solubility and dispersibility depend on surface coatings, which can be tailored for specific applications, such as thiolated polymers for biomedical use or citrate for colloidal stability.
Main Applications
In electronics, gold particles are used in conductive inks for printed circuits, flexible electronics, and RFID tags due to their oxidation resistance and low contact resistance. In medicine, they serve as contrast agents, drug delivery vehicles, and biosensors, leveraging their biocompatibility and SPR properties. Nanotechnology applications include catalytic converters, where gold particles enhance reaction efficiency, and environmental sensors for detecting pollutants. Their optical properties are exploited in photothermal therapy for cancer treatment and in diagnostic assays like lateral flow tests (e.g., pregnancy tests).
Safety and Storage
Gold particles are generally non-toxic but require careful handling in powder form to avoid inhalation or skin contact. Use gloves, masks, and eye protection when working with fine powders or colloidal suspensions. Store in airtight containers to prevent oxidation or contamination. For colloidal gold, avoid exposure to strong electrolytes or extreme pH, which can cause aggregation. Label containers clearly with particle size, concentration, and surface functionalization. Dispose of waste according to local regulations for precious metals.
B2B Procurement Guide
When sourcing gold particles, specify purity (e.g., 99.9% for electronics, 99.99% for biomedical use), particle size (nanometers to micrometers), and surface chemistry (e.g., citrate, PEG, or amine-coated). Request certificates of analysis (CoA) for trace metals and particle size distribution. Bulk purchases (kilograms) may qualify for discounts, but verify storage and shelf-life constraints. For specialized applications like drug delivery, work with suppliers offering custom functionalization. Compare prices from refiners, chemical distributors, and nanotechnology specialists, factoring in logistics and import duties for international shipments.
Related Manufacturers
- 主营：贵金属、热电偶、补偿导线、高温线
- 主营：fto靶材、钐靶材、硼化锆、高导电金粉、硒靶材、铝靶材、钆靶材、铽靶材、氟化镁、钇靶材、钼靶材、铬靶材、镉靶材、钽靶材、硒化锌、氟化镱、砷化镓、硒化锑、碲化镉、镍靶材、钨靶材、铑靶材、铒靶材、铪靶材、锑靶材、碲粉末
- 主营：合金靶材、特殊合金、溅射靶材、高纯材料、试样加工
- 主营：铜靶、铝靶、钛靶、高纯银颗粒、高纯铜颗粒、高纯铁颗粒、高纯钛颗粒、高纯钴颗粒、高纯铝颗粒、高熵合金、金颗粒、铂颗粒、高纯镍颗粒、铜合金、铝合金、铁合金(钢)、镍合金、钛合金、铬靶、纽扣锭
- 主营：镀膜材料、三氧化钨、高纯铟丝、蒸发颗粒、高纯钛颗粒、高纯铬颗粒、高纯铜颗粒、氧化镨粉末、高纯铝靶材、氧化铒粉末、高纯钒靶材、高纯铌靶材、高纯硅靶材、高纯钽靶材、高纯锗靶材、高纯铪靶材、三氧化二铁、高纯铬靶材、三氧化二铟、高纯锰靶材、氟化钙晶体、高纯硫化锌、高纯钨靶材、高纯锆靶材
- 主营：陶瓷靶材、铜靶材、银靶材、合金靶材、金属靶材、高纯合金靶材、单质金属靶、镍铜合金靶材、钛铌合金靶材、钼钽合金靶材、铝靶材、锂靶材、高纯银靶材、溅射靶、铬靶材、锆靶材、氧化铟镓锌靶材、铱靶材、铂靶材、硫酸钠靶材、二氧化硅靶材、氧化镁靶材、碲化锑靶材
- 主营：黄金靶材、贵金属铂铱铑、铂丝、铂铱丝
- 主营：导电银浆、高纯度铂丝、铱丝、铂金坩埚、铂金颗粒、铂金分析坩埚、实验室用铂颗粒、黄金丝、铂丝
- 主营：钯靶材、铌靶材、铝靶材、钨颗粒、钽颗粒、锑颗粒、铱颗粒、碲颗粒、钇颗粒、锗颗粒、硫化锑、硫化锌、银靶材、氧化铟、铜靶材、磷酸锂、硅靶材、氧化钕、碲化锑、钛酸锶、碳化硅、钛酸锂、钴靶材、氧化镁、石墨靶
- 主营：科研实验、真空熔炼、镀膜材料、合金靶材、高纯颗粒、拉伸试样件
- 主营：铬靶、二硼化钛靶材、轧制、镍铬合金靶材、镍钒合金靶材、镍铜合金靶材、钛硅合金靶材、合金熔炼、钛铝合金靶材、锰铜阻尼合金、钨镍铁合金、高熵合金、钴铬镍合金靶材、铝合金熔炼、镍合金熔炼、铜合金熔炼、钴铬钼合金、铜合金靶材、镍合金靶材、铬合金靶材、锻造、M2052、熔炼加工服务、钛靶材、石墨靶材
- 主营：金属靶材、合金靶材、蒸发颗粒、陶瓷靶材
- 主营：晶振片、单晶硅片、溅射靶材、金颗粒、银颗粒、铬颗粒、中间合金、合金熔炼、金靶材、键合金丝、合金靶材、金属箔片、常规金属靶材、电镜靶材、AZO靶材、棒材、箔片、坩埚、镍块、钒靶材、台阶靶材、蒸发耗材
- 主营：五氧化二铌矩形靶、钛酸锶衬底、石墨粉末、铝钪合金靶材、5N锰颗粒、高纯银颗粒、高纯铪颗粒、镀金硅片、钕颗粒、键合金丝、氧化锌铝靶材、导电氮化硼坩埚、球形粉末、球形铜粉、高纯钛片、晶振片、ITO靶材
- 主营：高熵合金、科研合金、高纯金属、溅射靶材