Abstract:
본 발명은 나노형광체 및 이의 제조방법에 관한 것으로, 하기 화학식1로 표시되는 Ce 3 + 과 Tb 3 + 이 공부활된(co-doped) 불화물계 제1화합물을 포함하는 나노형광체를 제공한다. [화학식1] NaGd 1 -pq- r M r F 4 :Ce 3 + p ,Tb 3 + q 상기 화학식1에서, 상기 p, q, r 및 M에 대한 설명은 발명의 상세한 설명에 기재된 것과 동일하므로, 그 기재를 생략한다. 상기 나노형광체는 발광 강도가 우수하고, 적외선 및/또는 자외선에 의하여 여기되어 가시광을 발광할 수 있는 업컨버젼 및/또는 다운컨버젼 특성과 더불어 자성을 가지므로 조영제, 위조 방지 코드 등으로 활용될 수 있다.
Abstract:
PURPOSE: A core/shell magnetic nanophosphor is provided to have excellent heat-laminating strength, to emit visible rays by being excited by infrared rays, and to have electromagnetic properties. CONSTITUTION: A core/shell magnetic nanophosphor comprises fluoride-based nanoparticles which are co-doped by Yb^3+ and Er^3+ represented by chemical formula 1: NaY_(1-w-z-x-y)Gd_wL_zF_4:Yb^(3+)_x,Er^(3+)_y. In chemical formula 1, 0.1
Abstract:
The present invention relates to a nono-fluorescent body and a manufacturing method therefor. The nano-fluorescent body including a first fluoride compound in which Ce3+ and Tb3+ in formula 1 are co-doped is provided. (Formula 1 is NaGd1-p-q-rMrF4:Ce3+p,Tb3+q. Detailed information for the p, q, r and M is omitted since the information is included in the detailed explanation of the present invention.) The luminescent intensity of the nono-fluorescent body is excellent, and since it has magnetic properties as well as upconversion or downconversion properties capable of radiating visible light, it can be utilized as a contrast medium and an anti-forgery code.
Abstract:
PURPOSE: A manufacturing method of a nanoparticle is provided to provide a lll-V group compound core or a core/shell nanoparticle of which the half-value breadth of the emission spectrum is 50 nm or less. CONSTITUTION: A manufacturing method of a nanoparticle comprises a step of growing InP core nanoparticles by mixing a first solution which includes an indium salt precursor, an acetate component, and a surfactant, and is at 180-220 °C, and a second solution which includes a phosphine precursor and is at 20-30 °C, to grow an InP core nanoparticles; a step of decreasing the temperature of the mixed solution to 100-170°C by -2°C or more per second in order to suppress the growth of an InP core nanoparticle; and a step of maintaining or etching the size of the InP core nanoparticle.
Abstract:
According to an embodiment of the present invention, a metal oxide complex comprises a shell layer which includes at least two layers of metal oxide nanoparticles mutually connected to each other and pores between the metal oxide nanoparticles; and hollow cores which are empty space in the inside of the shell layer. The metal oxide complex is re-collected and re-used and has some or entire empty places to be used as a catalyst, an antimicrobial agent or a carrier for delivering drug and entirely has pores in the shell layer.
Abstract:
The present invention relates to a nanophosphor and a method for manufacturing the same. The nanophosphor has upconversion properties to clearly emit light by infrared ray excitation, and can emit green light having stronger intensity of the light emission than an existing nanophosphor. The nanophosphor has upconversion properties to have almost no influence of self-emitting when applied as a biometric image to obtain a clear image, and is able to be synthesized in a small size of about 200 nm or less to be easily applied to such as bio-imaging and a forgery preventing code. Moreover, the nanophosphor has stronger light emitting properties by forming a shell, and can obtain further stronger light emitting properties if the contents of elements comprised in a core matrix are controlled.