研究目的
To propose a method that can efficiently identify the material of a single-organic particle by observing their field-induced translations without consuming the sample.
研究成果
The experimental χDIA values obtained from field-induced translations agree fairly well with the published values, indicating that the method of measuring χDIA of organic materials based on field-induced translation is verified with fairly good accuracy. The improvements made in the experimental procedures were effective in obtaining the χDIA values of organic particles with high success rates. The method can be used to thoroughly extract and identify a rare material from a mixture of heterogeneous particles without consuming the sample.
研究不足
The method requires a microgravity condition for the observation of field-induced translations, which may limit its applicability in some settings. Additionally, the success rate of field-induced translation was considerably low in previous experiments with organic particles due to strong attractive forces.
1：Experimental Design and Method Selection:
The method involves observing the field-induced translations of particles using an improved apparatus. The diamagnetic susceptibility χDIA of the particle is obtained from its translating velocity induced in a field-gradient produced by an Nd magnetic circuit.
2：Sample Selection and Data Sources:
The samples were separated from synthetic products with high purity (>
3：99%). List of Experimental Equipment and Materials:
A compact magnetic circuit composed of a pair of Ne–Fe–B plates (30 × 50 × 30 mm3) was used to produce the field gradient.
4：Experimental Procedures and Operational Workflow:
The particle samples were set on a sample stage placed in the area of monotonically decreasing field along the x-axis. A short μg condition (duration ～
5：5 s) was produced in a compact drop capsule. Data Analysis Methods:
The observed translation was analyzed based on an energy conservation rule assumed for the particle. The terminal velocity vT in the area with B = 0 is described by a specific equation to obtain the χDIA values of the individual particles.
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