A Personal Nanoparticle Counter

个人纳米粒子计数器

• 批准号: 8647547
• 负责人: Susanne Vera Hering
• 金额: $ 8.39万
• 依托单位: AEROSOL DYNAMICS, INC.
• 依托单位国家: 美国
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-21 至 2015-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8647547
• 关键词: Address; Air; Caliber; Consumption; Data; Detection; Development; Devices; Electronics; Exposure to; Health; Industry; Measures; Methods; Monitor; National Institute of Environmental Health Sciences; Optics; Particulate Matter; Performance; Physical condensation; Power Sources; Recycling; Relative Risks; Resolution; Technology; Time; Ultrafine; Water; Weight; base; cell growth; instrument; meetings; nanomaterials; nanometer; nanoparticle; nanoscale; operation; particle; particle counter; public health relevance; sensor; ultrafine particle; water flow

DESCRIPTION (provided by applicant): A Personal Nanoparticle Counter This proposal addresses the need for a rugged, wearable instrument for the precise, real-time monitoring of airborne number concentrations for fine, ultrafine and nanometer-sized particles. Proposed is a new type of laminar-flow water condensation method that detects and counts particles as small as 5 nm in a tippable device. We aim to demonstrate the feasibility of this technology for a portable and potentially wearable device, to measure nanometer and ultrafine particle concentrations with 1-s time resolution. Additionally, we will demonstrate its suitability for long term monitoring when power source is available. Specific aims are: 1) to verify the feasibility of a miniature, water-based condensation particle counter capable of: detecting at least 50% of particles with a diameter of 6 nm; detecting at least 95% of those particles with diameters above 10 nm; measuring particle concentrations from 103 - 106 cm-3; providing 1-sec time resolution at ambient concentrations with statistical error of less than 5%; providing comparable data, within 15%, to bench top condensation particle counters for ambient air 2) to demonstrate operation in any orientation, and when subject to jarring and jostling typical of what to be expected when worn. 3) to achieve the above for less than 2 watts of power consumption by the condensational growth cell and optics, with a weight of less than 200 grams (ie without control electronics or battery).

描述(由申请人提供)：个人纳米颗粒计数器本提案解决了对坚固耐用的、可穿戴的仪器的需求，该仪器用于精确、实时地监测空气中细、超细和纳米颗粒的数量浓度。提出了一种新型的层流冷凝方法，该方法在可倾倒装置中检测和计数小至5 nm的颗粒。我们的目标是证明这项技术用于便携式和潜在的可穿戴设备的可行性，以1-S的时间分辨率测量纳米和超细颗粒浓度。此外，我们还将展示其长期适用性。 电源可用时的定期监控。具体目标是：1)验证 一种小型水基凝结颗粒计数器，能够：检测直径为6 nm的颗粒的至少50%；检测直径大于10 nm的颗粒的至少95%；测量103-106 cm-3的颗粒浓度；在环境浓度下提供1秒的时间分辨率，统计误差小于5%；向环境空气台式凝结颗粒计数器提供15%以内的可比数据2)以演示在任何方向上的操作，以及当受到穿戴时的典型碰撞和推挤时。3)在重量小于200克(即没有控制电子设备或电池)的冷凝式生长电池和光学器件的功耗低于2瓦的情况下实现上述目标。